./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:33:53,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:33:53,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:33:53,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:33:53,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:33:53,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:33:53,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:33:53,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:33:53,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:33:53,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:33:53,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:33:53,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:33:53,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:33:53,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:33:53,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:33:53,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:33:53,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:33:53,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:33:53,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:33:53,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:33:53,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:33:53,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:33:53,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:33:53,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:33:53,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:33:53,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:33:53,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:33:53,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:33:53,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:33:53,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:33:53,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:33:53,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:33:53,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:33:53,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:33:53,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:33:53,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:33:53,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:33:53,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:33:53,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:33:53,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:33:53,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:33:53,995 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:33:54,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:33:54,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:33:54,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:33:54,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:33:54,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:33:54,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:33:54,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:33:54,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:33:54,027 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:33:54,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:33:54,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:33:54,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:33:54,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:33:54,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:33:54,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:33:54,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:33:54,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:33:54,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:33:54,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:33:54,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:33:54,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:33:54,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:33:54,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:33:54,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:33:54,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:33:54,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:33:54,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:33:54,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:33:54,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:33:54,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:33:54,036 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:33:54,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:33:54,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:33:54,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 [2021-12-27 21:33:54,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:33:54,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:33:54,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:33:54,346 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:33:54,349 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:33:54,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2021-12-27 21:33:54,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc378ee3/39ea30cba611479aaa0adafc89a7ac84/FLAG9287a1562 [2021-12-27 21:33:54,748 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:33:54,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2021-12-27 21:33:54,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc378ee3/39ea30cba611479aaa0adafc89a7ac84/FLAG9287a1562 [2021-12-27 21:33:55,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc378ee3/39ea30cba611479aaa0adafc89a7ac84 [2021-12-27 21:33:55,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:33:55,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:33:55,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:33:55,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:33:55,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:33:55,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa1cee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55, skipping insertion in model container [2021-12-27 21:33:55,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:33:55,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:33:55,275 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-programs/partial_mod_count_limited_1.c[331,344] [2021-12-27 21:33:55,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:33:55,291 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:33:55,298 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-programs/partial_mod_count_limited_1.c[331,344] [2021-12-27 21:33:55,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:33:55,317 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:33:55,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55 WrapperNode [2021-12-27 21:33:55,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:33:55,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:33:55,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:33:55,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:33:55,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,386 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2021-12-27 21:33:55,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:33:55,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:33:55,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:33:55,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:33:55,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:33:55,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:33:55,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:33:55,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:33:55,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (1/1) ... [2021-12-27 21:33:55,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:33:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:55,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 21:33:55,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 21:33:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:33:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:33:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:33:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:33:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:33:55,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:33:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:33:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:33:55,548 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:33:55,549 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:33:55,678 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:33:55,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:33:55,682 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-27 21:33:55,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:33:55 BoogieIcfgContainer [2021-12-27 21:33:55,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:33:55,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:33:55,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:33:55,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:33:55,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:33:55" (1/3) ... [2021-12-27 21:33:55,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3664707f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:33:55, skipping insertion in model container [2021-12-27 21:33:55,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:33:55" (2/3) ... [2021-12-27 21:33:55,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3664707f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:33:55, skipping insertion in model container [2021-12-27 21:33:55,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:33:55" (3/3) ... [2021-12-27 21:33:55,689 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2021-12-27 21:33:55,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:33:55,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:33:55,721 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:33:55,725 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 21:33:55,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:33:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 21:33:55,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:55,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:55,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-12-27 21:33:55,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:55,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523019689] [2021-12-27 21:33:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:55,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:55,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:33:55,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169623013] [2021-12-27 21:33:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:55,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:55,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:33:55,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:33:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-27 21:33:55,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:33:55,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:33:55,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523019689] [2021-12-27 21:33:55,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:33:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169623013] [2021-12-27 21:33:55,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169623013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:33:55,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:33:55,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:33:55,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630894938] [2021-12-27 21:33:55,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:33:55,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:33:55,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:55,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:33:55,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:33:55,961 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:55,974 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-12-27 21:33:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:33:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-27 21:33:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:55,981 INFO L225 Difference]: With dead ends: 41 [2021-12-27 21:33:55,982 INFO L226 Difference]: Without dead ends: 18 [2021-12-27 21:33:55,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:33:55,994 INFO L933 BasicCegarLoop]: 26 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, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:55,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:33:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-27 21:33:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-27 21:33:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-27 21:33:56,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-12-27 21:33:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:56,021 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-27 21:33:56,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-27 21:33:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 21:33:56,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:56,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:56,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-27 21:33:56,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-27 21:33:56,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-12-27 21:33:56,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:56,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590778542] [2021-12-27 21:33:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:56,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:56,264 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:33:56,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184976859] [2021-12-27 21:33:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:56,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:56,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:33:56,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:33:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:33:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:33:56,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:33:56,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590778542] [2021-12-27 21:33:56,439 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:33:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184976859] [2021-12-27 21:33:56,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184976859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:33:56,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:33:56,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:33:56,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000802736] [2021-12-27 21:33:56,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:33:56,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:33:56,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:33:56,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:33:56,442 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:56,472 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-12-27 21:33:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:33:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-27 21:33:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:56,474 INFO L225 Difference]: With dead ends: 40 [2021-12-27 21:33:56,474 INFO L226 Difference]: Without dead ends: 31 [2021-12-27 21:33:56,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:33:56,475 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:56,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:33:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-27 21:33:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-12-27 21:33:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-12-27 21:33:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-27 21:33:56,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-12-27 21:33:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:56,480 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-27 21:33:56,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-27 21:33:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:33:56,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:56,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:56,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 21:33:56,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-27 21:33:56,699 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 784383783, now seen corresponding path program 1 times [2021-12-27 21:33:56,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:56,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601678594] [2021-12-27 21:33:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:56,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:56,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:33:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173702960] [2021-12-27 21:33:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:56,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:56,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:56,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:33:56,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:33:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:33:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:33:56,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:33:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:33:56,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601678594] [2021-12-27 21:33:56,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:33:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173702960] [2021-12-27 21:33:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173702960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:33:56,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:33:56,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-27 21:33:56,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066652528] [2021-12-27 21:33:56,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:33:56,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:33:56,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:33:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:33:56,948 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:57,037 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-12-27 21:33:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:33:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 16 [2021-12-27 21:33:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:57,041 INFO L225 Difference]: With dead ends: 68 [2021-12-27 21:33:57,041 INFO L226 Difference]: Without dead ends: 59 [2021-12-27 21:33:57,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:33:57,043 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 174 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:57,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 43 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:33:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-27 21:33:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2021-12-27 21:33:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 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) [2021-12-27 21:33:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-12-27 21:33:57,049 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 16 [2021-12-27 21:33:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:57,049 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-12-27 21:33:57,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-12-27 21:33:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:33:57,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:57,050 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:57,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:33:57,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:57,268 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -520466666, now seen corresponding path program 2 times [2021-12-27 21:33:57,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:57,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145813335] [2021-12-27 21:33:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:57,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:57,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:33:57,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430978619] [2021-12-27 21:33:57,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:33:57,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:57,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:33:57,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:33:57,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-27 21:33:57,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:33:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-27 21:33:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-27 21:33:57,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:33:57,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145813335] [2021-12-27 21:33:57,616 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:33:57,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430978619] [2021-12-27 21:33:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430978619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:33:57,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:33:57,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:33:57,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17219806] [2021-12-27 21:33:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:33:57,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:33:57,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:33:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:33:57,618 INFO L87 Difference]: Start difference. First operand 34 states and 44 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) [2021-12-27 21:33:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:57,699 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-27 21:33:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:33:57,700 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 31 [2021-12-27 21:33:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:57,701 INFO L225 Difference]: With dead ends: 46 [2021-12-27 21:33:57,701 INFO L226 Difference]: Without dead ends: 44 [2021-12-27 21:33:57,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:33:57,702 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:57,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 40 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:33:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-27 21:33:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-12-27 21:33:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-27 21:33:57,707 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 31 [2021-12-27 21:33:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:57,707 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-27 21:33:57,708 INFO L471 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) [2021-12-27 21:33:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-27 21:33:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:33:57,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:57,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:57,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-27 21:33:57,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:57,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash -520526248, now seen corresponding path program 1 times [2021-12-27 21:33:57,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:57,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364928705] [2021-12-27 21:33:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:57,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:57,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:33:57,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486607032] [2021-12-27 21:33:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:57,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:57,952 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:33:57,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:33:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:58,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 21:33:58,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:33:58,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:33:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:33:58,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:58,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364928705] [2021-12-27 21:33:58,240 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:33:58,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486607032] [2021-12-27 21:33:58,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486607032] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:33:58,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:33:58,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-27 21:33:58,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155135104] [2021-12-27 21:33:58,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:33:58,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-27 21:33:58,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-27 21:33:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:33:58,242 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-12-27 21:33:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:58,397 INFO L93 Difference]: Finished difference Result 211 states and 259 transitions. [2021-12-27 21:33:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 21:33:58,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) Word has length 31 [2021-12-27 21:33:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:58,399 INFO L225 Difference]: With dead ends: 211 [2021-12-27 21:33:58,399 INFO L226 Difference]: Without dead ends: 196 [2021-12-27 21:33:58,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:33:58,400 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 333 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:58,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 98 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:33:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-27 21:33:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 70. [2021-12-27 21:33:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 69 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2021-12-27 21:33:58,409 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 31 [2021-12-27 21:33:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:58,409 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2021-12-27 21:33:58,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-12-27 21:33:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2021-12-27 21:33:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-27 21:33:58,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:58,411 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:58,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:33:58,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:58,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1117364680, now seen corresponding path program 2 times [2021-12-27 21:33:58,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914183024] [2021-12-27 21:33:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:58,647 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:33:58,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565030000] [2021-12-27 21:33:58,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:33:58,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:58,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:33:58,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:33:58,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-27 21:33:58,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:33:58,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-27 21:33:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:33:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-27 21:33:59,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:33:59,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:33:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914183024] [2021-12-27 21:33:59,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:33:59,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565030000] [2021-12-27 21:33:59,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565030000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:33:59,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:33:59,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-27 21:33:59,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363029140] [2021-12-27 21:33:59,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:33:59,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-27 21:33:59,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:33:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-27 21:33:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:33:59,393 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-12-27 21:33:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:33:59,525 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2021-12-27 21:33:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:33:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 61 [2021-12-27 21:33:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:33:59,527 INFO L225 Difference]: With dead ends: 83 [2021-12-27 21:33:59,527 INFO L226 Difference]: Without dead ends: 81 [2021-12-27 21:33:59,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:33:59,528 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:33:59,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:33:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-27 21:33:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-12-27 21:33:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 75 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:33:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2021-12-27 21:33:59,535 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 61 [2021-12-27 21:33:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:33:59,536 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2021-12-27 21:33:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-12-27 21:33:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2021-12-27 21:33:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-27 21:33:59,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:33:59,537 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:33:59,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-27 21:33:59,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:59,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:33:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:33:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash 824832363, now seen corresponding path program 1 times [2021-12-27 21:33:59,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:33:59,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276313548] [2021-12-27 21:33:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:59,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:33:59,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:33:59,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796325684] [2021-12-27 21:33:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:33:59,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:33:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:33:59,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:33:59,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:33:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:33:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-27 21:33:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:34:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:34:00,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:34:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:34:00,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:34:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276313548] [2021-12-27 21:34:00,333 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:34:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796325684] [2021-12-27 21:34:00,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796325684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:34:00,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:34:00,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-12-27 21:34:00,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391799138] [2021-12-27 21:34:00,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:34:00,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-27 21:34:00,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:34:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-27 21:34:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-27 21:34:00,336 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:34:00,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:34:00,799 INFO L93 Difference]: Finished difference Result 568 states and 691 transitions. [2021-12-27 21:34:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-27 21:34:00,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 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 67 [2021-12-27 21:34:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:34:00,802 INFO L225 Difference]: With dead ends: 568 [2021-12-27 21:34:00,802 INFO L226 Difference]: Without dead ends: 547 [2021-12-27 21:34:00,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-27 21:34:00,803 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1026 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:34:00,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 205 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:34:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-27 21:34:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 136. [2021-12-27 21:34:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.362962962962963) internal successors, (184), 135 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:34:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 184 transitions. [2021-12-27 21:34:00,816 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 184 transitions. Word has length 67 [2021-12-27 21:34:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:34:00,817 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 184 transitions. [2021-12-27 21:34:00,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:34:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 184 transitions. [2021-12-27 21:34:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-27 21:34:00,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:34:00,818 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:34:00,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:34:01,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:34:01,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:34:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:34:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1889532203, now seen corresponding path program 2 times [2021-12-27 21:34:01,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:34:01,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846980776] [2021-12-27 21:34:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:34:01,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:34:01,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:34:01,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597707325] [2021-12-27 21:34:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:34:01,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:34:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:34:01,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:34:01,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:34:01,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:34:01,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:34:01,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-27 21:34:01,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:34:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:34:01,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:34:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:34:02,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:34:02,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846980776] [2021-12-27 21:34:02,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:34:02,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597707325] [2021-12-27 21:34:02,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597707325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:34:02,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:34:02,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-12-27 21:34:02,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776174717] [2021-12-27 21:34:02,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:34:02,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-27 21:34:02,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:34:02,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-27 21:34:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-12-27 21:34:02,571 INFO L87 Difference]: Start difference. First operand 136 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:34:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:34:04,327 INFO L93 Difference]: Finished difference Result 1168 states and 1423 transitions. [2021-12-27 21:34:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-27 21:34:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 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 127 [2021-12-27 21:34:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:34:04,331 INFO L225 Difference]: With dead ends: 1168 [2021-12-27 21:34:04,331 INFO L226 Difference]: Without dead ends: 1147 [2021-12-27 21:34:04,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-12-27 21:34:04,333 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2694 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:34:04,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2694 Valid, 421 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 21:34:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-12-27 21:34:04,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 256. [2021-12-27 21:34:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.380392156862745) internal successors, (352), 255 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:34:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 352 transitions. [2021-12-27 21:34:04,371 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 352 transitions. Word has length 127 [2021-12-27 21:34:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:34:04,372 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 352 transitions. [2021-12-27 21:34:04,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:34:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 352 transitions. [2021-12-27 21:34:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-27 21:34:04,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:34:04,382 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:34:04,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 21:34:04,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-27 21:34:04,599 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:34:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:34:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1454397269, now seen corresponding path program 3 times [2021-12-27 21:34:04,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:34:04,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863215108] [2021-12-27 21:34:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:34:04,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:34:04,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:34:04,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554991376] [2021-12-27 21:34:04,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:34:04,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:34:04,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:34:04,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:34:04,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:34:04,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-27 21:34:04,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:34:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-27 21:34:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:34:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2021-12-27 21:34:05,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:34:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2021-12-27 21:34:06,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:34:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863215108] [2021-12-27 21:34:06,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:34:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554991376] [2021-12-27 21:34:06,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554991376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:34:06,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:34:06,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-27 21:34:06,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184853729] [2021-12-27 21:34:06,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:34:06,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 21:34:06,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:34:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 21:34:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-27 21:34:06,970 INFO L87 Difference]: Start difference. First operand 256 states and 352 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-12-27 21:34:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:34:07,157 INFO L93 Difference]: Finished difference Result 287 states and 391 transitions. [2021-12-27 21:34:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-27 21:34:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 247 [2021-12-27 21:34:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:34:07,158 INFO L225 Difference]: With dead ends: 287 [2021-12-27 21:34:07,158 INFO L226 Difference]: Without dead ends: 285 [2021-12-27 21:34:07,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-12-27 21:34:07,159 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 150 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:34:07,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 88 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:34:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-27 21:34:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 280. [2021-12-27 21:34:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.3620071684587813) internal successors, (380), 279 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:34:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 380 transitions. [2021-12-27 21:34:07,188 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 380 transitions. Word has length 247 [2021-12-27 21:34:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:34:07,189 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 380 transitions. [2021-12-27 21:34:07,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-12-27 21:34:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 380 transitions. [2021-12-27 21:34:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-27 21:34:07,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:34:07,191 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:34:07,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:34:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:34:07,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:34:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:34:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1033805559, now seen corresponding path program 4 times [2021-12-27 21:34:07,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:34:07,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261283107] [2021-12-27 21:34:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:34:07,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:34:07,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:34:07,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650901703] [2021-12-27 21:34:07,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:34:07,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:34:07,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:34:07,420 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) [2021-12-27 21:34:07,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:34:55,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:34:55,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:34:55,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-27 21:34:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:34:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5301 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-27 21:34:57,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:35:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5301 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-27 21:35:00,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:35:00,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261283107] [2021-12-27 21:35:00,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:35:00,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650901703] [2021-12-27 21:35:00,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650901703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:35:00,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:35:00,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-12-27 21:35:00,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758589661] [2021-12-27 21:35:00,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:35:00,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-27 21:35:00,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:35:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-27 21:35:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-12-27 21:35:00,015 INFO L87 Difference]: Start difference. First operand 280 states and 380 transitions. Second operand has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:35:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:35:08,427 INFO L93 Difference]: Finished difference Result 4552 states and 5433 transitions. [2021-12-27 21:35:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-27 21:35:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 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 271 [2021-12-27 21:35:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:35:08,466 INFO L225 Difference]: With dead ends: 4552 [2021-12-27 21:35:08,467 INFO L226 Difference]: Without dead ends: 4507 [2021-12-27 21:35:08,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-12-27 21:35:08,472 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 5960 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5960 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-27 21:35:08,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5960 Valid, 847 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-27 21:35:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-12-27 21:35:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 520. [2021-12-27 21:35:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.3795761078998072) internal successors, (716), 519 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:35:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 716 transitions. [2021-12-27 21:35:08,524 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 716 transitions. Word has length 271 [2021-12-27 21:35:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:35:08,524 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 716 transitions. [2021-12-27 21:35:08,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:35:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 716 transitions. [2021-12-27 21:35:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-12-27 21:35:08,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:35:08,529 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:35:08,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:35:08,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 21:35:08,730 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:35:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:35:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1885306359, now seen corresponding path program 5 times [2021-12-27 21:35:08,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:35:08,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773291941] [2021-12-27 21:35:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:35:08,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:35:08,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:35:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028599693] [2021-12-27 21:35:08,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:35:08,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:35:08,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:35:08,804 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) [2021-12-27 21:35:08,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process