./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum60.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/reducercommutativity/rangesum60.i -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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:13:31,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:13:31,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:13:31,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:13:31,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:13:31,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:13:31,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:13:31,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:13:31,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:13:31,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:13:31,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:13:31,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:13:31,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:13:31,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:13:31,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:13:31,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:13:31,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:13:31,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:13:31,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:13:31,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:13:31,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:13:31,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:13:31,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:13:31,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:13:31,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:13:31,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:13:31,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:13:31,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:13:31,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:13:31,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:13:31,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:13:31,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:13:31,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:13:31,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:13:31,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:13:31,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:13:31,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:13:31,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:13:31,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:13:31,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:13:31,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:13:31,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:13:31,985 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:13:31,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:13:31,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:13:31,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:13:31,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:13:31,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:13:31,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:13:31,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:13:31,988 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:13:31,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:13:31,989 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:13:31,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:13:31,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:13:31,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:13:31,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:13:31,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:13:31,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:13:31,991 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:13:31,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:13:31,991 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:13:31,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:13:31,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:13:31,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:13:31,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:13:31,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:13:31,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:13:31,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:13:31,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:13:31,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:13:31,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:13:31,993 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:13:31,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:13:31,994 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:13:31,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:13:31,994 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:13:31,994 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2023-02-13 22:13:32,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:13:32,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:13:32,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:13:32,219 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:13:32,219 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:13:32,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-02-13 22:13:33,354 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:13:33,614 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:13:33,614 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-02-13 22:13:33,620 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7417dbc9/9d26d2a219ce4af382a139087aba63f8/FLAG218477cad [2023-02-13 22:13:33,638 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7417dbc9/9d26d2a219ce4af382a139087aba63f8 [2023-02-13 22:13:33,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:13:33,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:13:33,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:13:33,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:13:33,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:13:33,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a8aac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33, skipping insertion in model container [2023-02-13 22:13:33,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:13:33,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:13:33,824 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2023-02-13 22:13:33,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:13:33,840 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:13:33,856 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2023-02-13 22:13:33,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:13:33,866 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:13:33,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33 WrapperNode [2023-02-13 22:13:33,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:13:33,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:13:33,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:13:33,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:13:33,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,902 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-02-13 22:13:33,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:13:33,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:13:33,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:13:33,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:13:33,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,922 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:13:33,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:13:33,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:13:33,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:13:33,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (1/1) ... [2023-02-13 22:13:33,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:13:33,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:33,972 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) [2023-02-13 22:13:33,980 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 [2023-02-13 22:13:34,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:13:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:13:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:13:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:13:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:13:34,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:13:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:13:34,005 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-02-13 22:13:34,005 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-02-13 22:13:34,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:13:34,074 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:13:34,076 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:13:34,283 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:13:34,288 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:13:34,288 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-13 22:13:34,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:13:34 BoogieIcfgContainer [2023-02-13 22:13:34,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:13:34,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:13:34,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:13:34,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:13:34,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:13:33" (1/3) ... [2023-02-13 22:13:34,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146e5173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:13:34, skipping insertion in model container [2023-02-13 22:13:34,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:13:33" (2/3) ... [2023-02-13 22:13:34,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146e5173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:13:34, skipping insertion in model container [2023-02-13 22:13:34,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:13:34" (3/3) ... [2023-02-13 22:13:34,296 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2023-02-13 22:13:34,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:13:34,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:13:34,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:13:34,354 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a445c63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:13:34,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:13:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-13 22:13:34,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:34,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:34,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash -275565944, now seen corresponding path program 1 times [2023-02-13 22:13:34,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:34,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575685270] [2023-02-13 22:13:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:34,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:34,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575685270] [2023-02-13 22:13:34,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-13 22:13:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772534434] [2023-02-13 22:13:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:34,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:34,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:34,549 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) [2023-02-13 22:13:34,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:13:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-13 22:13:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 22:13:34,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 22:13:34,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772534434] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:13:34,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:13:34,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 22:13:34,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623580139] [2023-02-13 22:13:34,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:13:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 22:13:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:34,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 22:13:34,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:13:34,728 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:34,745 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-13 22:13:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 22:13:34,747 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-13 22:13:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:34,753 INFO L225 Difference]: With dead ends: 52 [2023-02-13 22:13:34,754 INFO L226 Difference]: Without dead ends: 24 [2023-02-13 22:13:34,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:13:34,760 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2023-02-13 22:13:34,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-13 22:13:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-13 22:13:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-02-13 22:13:34,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2023-02-13 22:13:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:34,791 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-02-13 22:13:34,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-02-13 22:13:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-13 22:13:34,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:34,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:34,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-13 22:13:34,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:34,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1257002967, now seen corresponding path program 1 times [2023-02-13 22:13:34,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:34,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506552140] [2023-02-13 22:13:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:35,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:35,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506552140] [2023-02-13 22:13:35,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-13 22:13:35,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381609579] [2023-02-13 22:13:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:35,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:35,032 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) [2023-02-13 22:13:35,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:13:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:35,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-13 22:13:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 22:13:35,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 22:13:35,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381609579] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:13:35,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:13:35,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:13:35,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675201223] [2023-02-13 22:13:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:13:35,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:13:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:13:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:35,175 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 22:13:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:35,187 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-13 22:13:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:13:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-02-13 22:13:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:35,189 INFO L225 Difference]: With dead ends: 46 [2023-02-13 22:13:35,189 INFO L226 Difference]: Without dead ends: 26 [2023-02-13 22:13:35,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:35,191 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:35,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-13 22:13:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-13 22:13:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-13 22:13:35,199 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 29 [2023-02-13 22:13:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:35,199 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-13 22:13:35,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 22:13:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-13 22:13:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-13 22:13:35,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:35,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:35,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:35,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-13 22:13:35,407 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -653100523, now seen corresponding path program 1 times [2023-02-13 22:13:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875579970] [2023-02-13 22:13:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:35,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:35,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875579970] [2023-02-13 22:13:35,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-13 22:13:35,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785760305] [2023-02-13 22:13:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:35,460 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) [2023-02-13 22:13:35,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:13:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-13 22:13:35,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 22:13:35,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 22:13:35,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785760305] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:13:35,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:13:35,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:13:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277152686] [2023-02-13 22:13:35,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:13:35,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:13:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:13:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:35,584 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:35,598 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-02-13 22:13:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:13:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-13 22:13:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:35,599 INFO L225 Difference]: With dead ends: 46 [2023-02-13 22:13:35,599 INFO L226 Difference]: Without dead ends: 28 [2023-02-13 22:13:35,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:35,601 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:35,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-13 22:13:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-02-13 22:13:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-13 22:13:35,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2023-02-13 22:13:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:35,612 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-13 22:13:35,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-13 22:13:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-13 22:13:35,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:35,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:35,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:35,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:35,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1081404920, now seen corresponding path program 1 times [2023-02-13 22:13:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:35,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675611150] [2023-02-13 22:13:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675611150] [2023-02-13 22:13:35,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-13 22:13:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364508841] [2023-02-13 22:13:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:35,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:35,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:35,851 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) [2023-02-13 22:13:35,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:13:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:35,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-13 22:13:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 22:13:35,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 22:13:35,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364508841] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:13:35,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:13:35,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:13:35,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246569305] [2023-02-13 22:13:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:13:35,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:13:35,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:13:35,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:35,993 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:36,010 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-02-13 22:13:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:13:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-02-13 22:13:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:36,012 INFO L225 Difference]: With dead ends: 44 [2023-02-13 22:13:36,012 INFO L226 Difference]: Without dead ends: 29 [2023-02-13 22:13:36,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:36,013 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:36,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-13 22:13:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-13 22:13:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-13 22:13:36,034 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 40 [2023-02-13 22:13:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:36,035 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-13 22:13:36,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-13 22:13:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-13 22:13:36,036 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:36,037 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:36,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:36,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:36,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash -673301430, now seen corresponding path program 1 times [2023-02-13 22:13:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:36,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550247930] [2023-02-13 22:13:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:36,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:36,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550247930] [2023-02-13 22:13:36,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-13 22:13:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260422962] [2023-02-13 22:13:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:36,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:36,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:36,270 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) [2023-02-13 22:13:36,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 22:13:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:36,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 22:13:36,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-13 22:13:36,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 22:13:36,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260422962] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:13:36,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:13:36,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:13:36,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982662621] [2023-02-13 22:13:36,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:13:36,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:13:36,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:36,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:13:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:36,391 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:36,406 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-02-13 22:13:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:13:36,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-02-13 22:13:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:36,409 INFO L225 Difference]: With dead ends: 55 [2023-02-13 22:13:36,410 INFO L226 Difference]: Without dead ends: 34 [2023-02-13 22:13:36,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:13:36,412 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:36,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-13 22:13:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-02-13 22:13:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-13 22:13:36,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 42 [2023-02-13 22:13:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:36,430 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-13 22:13:36,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 22:13:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-13 22:13:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-13 22:13:36,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:36,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:36,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:36,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:36,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:36,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1042180377, now seen corresponding path program 1 times [2023-02-13 22:13:36,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:36,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948113466] [2023-02-13 22:13:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:36,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:36,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-13 22:13:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:13:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:36,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-13 22:13:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 22:13:36,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:36,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948113466] [2023-02-13 22:13:36,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948113466] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:13:36,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594081988] [2023-02-13 22:13:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:36,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:36,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:36,807 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) [2023-02-13 22:13:36,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 22:13:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 22:13:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-13 22:13:36,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-13 22:13:36,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594081988] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:36,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:13:36,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-13 22:13:36,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064590805] [2023-02-13 22:13:36,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-13 22:13:37,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:37,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-13 22:13:37,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-13 22:13:37,003 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:37,064 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2023-02-13 22:13:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 22:13:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2023-02-13 22:13:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:37,069 INFO L225 Difference]: With dead ends: 69 [2023-02-13 22:13:37,070 INFO L226 Difference]: Without dead ends: 42 [2023-02-13 22:13:37,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-13 22:13:37,072 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:37,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-13 22:13:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-02-13 22:13:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-02-13 22:13:37,082 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2023-02-13 22:13:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:37,082 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-02-13 22:13:37,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-02-13 22:13:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-13 22:13:37,084 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:37,084 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:37,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-13 22:13:37,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:37,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -604386836, now seen corresponding path program 2 times [2023-02-13 22:13:37,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:37,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830192615] [2023-02-13 22:13:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:37,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:37,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 22:13:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:37,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-13 22:13:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:37,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-13 22:13:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-13 22:13:37,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:37,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830192615] [2023-02-13 22:13:37,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830192615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:13:37,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331428772] [2023-02-13 22:13:37,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:13:37,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:37,593 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) [2023-02-13 22:13:37,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 22:13:37,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:13:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 22:13:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-13 22:13:37,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-13 22:13:37,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331428772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:37,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:13:37,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-13 22:13:37,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579241782] [2023-02-13 22:13:37,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:37,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 22:13:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 22:13:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:13:37,853 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-13 22:13:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:37,918 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2023-02-13 22:13:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-13 22:13:37,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2023-02-13 22:13:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:37,921 INFO L225 Difference]: With dead ends: 86 [2023-02-13 22:13:37,921 INFO L226 Difference]: Without dead ends: 56 [2023-02-13 22:13:37,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:13:37,926 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:37,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 112 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-13 22:13:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2023-02-13 22:13:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-02-13 22:13:37,942 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 57 [2023-02-13 22:13:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:37,942 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-02-13 22:13:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-13 22:13:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-02-13 22:13:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-13 22:13:37,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:37,948 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:37,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-13 22:13:38,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:38,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash 948362870, now seen corresponding path program 1 times [2023-02-13 22:13:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:38,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799217106] [2023-02-13 22:13:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:38,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:38,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:13:38,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458819699] [2023-02-13 22:13:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:38,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:38,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:38,187 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) [2023-02-13 22:13:38,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 22:13:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 22:13:38,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-13 22:13:38,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-13 22:13:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799217106] [2023-02-13 22:13:38,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:13:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458819699] [2023-02-13 22:13:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458819699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:38,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:13:38,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-02-13 22:13:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965996550] [2023-02-13 22:13:38,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 22:13:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 22:13:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:13:38,660 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:38,731 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2023-02-13 22:13:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 22:13:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2023-02-13 22:13:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:38,734 INFO L225 Difference]: With dead ends: 103 [2023-02-13 22:13:38,734 INFO L226 Difference]: Without dead ends: 75 [2023-02-13 22:13:38,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:13:38,737 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:38,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-13 22:13:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-02-13 22:13:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-02-13 22:13:38,759 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 78 [2023-02-13 22:13:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:38,760 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-02-13 22:13:38,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-02-13 22:13:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-13 22:13:38,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:38,767 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:38,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:38,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-13 22:13:38,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash 468172686, now seen corresponding path program 2 times [2023-02-13 22:13:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:38,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805785434] [2023-02-13 22:13:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:38,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:38,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:13:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457457476] [2023-02-13 22:13:38,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:13:38,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:38,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:38,997 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) [2023-02-13 22:13:39,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 22:13:39,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:13:39,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-13 22:13:39,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-13 22:13:39,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-13 22:13:40,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:40,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805785434] [2023-02-13 22:13:40,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:13:40,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457457476] [2023-02-13 22:13:40,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457457476] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:40,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:13:40,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-02-13 22:13:40,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70255985] [2023-02-13 22:13:40,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:40,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-13 22:13:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-13 22:13:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 22:13:40,138 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:40,281 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2023-02-13 22:13:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-13 22:13:40,282 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 102 [2023-02-13 22:13:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:40,283 INFO L225 Difference]: With dead ends: 151 [2023-02-13 22:13:40,283 INFO L226 Difference]: Without dead ends: 123 [2023-02-13 22:13:40,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 22:13:40,286 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:40,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 236 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:13:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-13 22:13:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-02-13 22:13:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2023-02-13 22:13:40,304 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 102 [2023-02-13 22:13:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:40,304 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2023-02-13 22:13:40,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2023-02-13 22:13:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-13 22:13:40,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:40,307 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:40,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:40,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:40,513 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:40,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:40,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1075718590, now seen corresponding path program 3 times [2023-02-13 22:13:40,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:40,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75874179] [2023-02-13 22:13:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:40,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:40,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:13:40,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784499240] [2023-02-13 22:13:40,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:13:40,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:40,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:40,580 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) [2023-02-13 22:13:40,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 22:13:40,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 22:13:40,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 22:13:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 2190 trivial. 0 not checked. [2023-02-13 22:13:40,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2023-02-13 22:13:40,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75874179] [2023-02-13 22:13:40,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:13:40,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784499240] [2023-02-13 22:13:40,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784499240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:40,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:13:40,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-02-13 22:13:40,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979226421] [2023-02-13 22:13:40,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:40,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 22:13:40,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 22:13:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-13 22:13:40,733 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:13:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:40,748 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2023-02-13 22:13:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 22:13:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2023-02-13 22:13:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:40,750 INFO L225 Difference]: With dead ends: 149 [2023-02-13 22:13:40,750 INFO L226 Difference]: Without dead ends: 129 [2023-02-13 22:13:40,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-13 22:13:40,751 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:40,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 53 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:13:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-13 22:13:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-02-13 22:13:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2023-02-13 22:13:40,757 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 150 [2023-02-13 22:13:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:40,758 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2023-02-13 22:13:40,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:13:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2023-02-13 22:13:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-13 22:13:40,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:40,759 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:40,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-13 22:13:40,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-13 22:13:40,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:40,966 INFO L85 PathProgramCache]: Analyzing trace with hash -379068284, now seen corresponding path program 4 times [2023-02-13 22:13:40,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:40,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333339648] [2023-02-13 22:13:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:40,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:41,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:13:41,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289566939] [2023-02-13 22:13:41,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:13:41,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:41,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:41,016 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) [2023-02-13 22:13:41,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 22:13:41,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:13:41,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-13 22:13:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-13 22:13:42,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-13 22:13:43,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:43,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333339648] [2023-02-13 22:13:43,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:13:43,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289566939] [2023-02-13 22:13:43,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289566939] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:43,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:13:43,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2023-02-13 22:13:43,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849633364] [2023-02-13 22:13:43,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:43,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-13 22:13:43,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:43,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-13 22:13:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2023-02-13 22:13:43,570 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:43,721 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2023-02-13 22:13:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-13 22:13:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 156 [2023-02-13 22:13:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:43,723 INFO L225 Difference]: With dead ends: 191 [2023-02-13 22:13:43,723 INFO L226 Difference]: Without dead ends: 157 [2023-02-13 22:13:43,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 216 SyntacticMatches, 34 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2023-02-13 22:13:43,725 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:43,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 262 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:13:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-13 22:13:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-13 22:13:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:13:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 163 transitions. [2023-02-13 22:13:43,731 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 163 transitions. Word has length 156 [2023-02-13 22:13:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:43,731 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 163 transitions. [2023-02-13 22:13:43,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-13 22:13:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 163 transitions. [2023-02-13 22:13:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-02-13 22:13:43,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:43,733 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:43,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:43,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-13 22:13:43,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1942589664, now seen corresponding path program 5 times [2023-02-13 22:13:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143608152] [2023-02-13 22:13:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:44,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:13:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327594865] [2023-02-13 22:13:44,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:13:44,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:44,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:44,005 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:13:44,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-13 22:15:01,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2023-02-13 22:15:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:01,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:15:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 3686 trivial. 0 not checked. [2023-02-13 22:15:01,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 3716 trivial. 0 not checked. [2023-02-13 22:15:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143608152] [2023-02-13 22:15:01,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:01,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327594865] [2023-02-13 22:15:01,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327594865] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:01,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:01,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-02-13 22:15:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755856128] [2023-02-13 22:15:01,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:01,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 22:15:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 22:15:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-13 22:15:01,209 INFO L87 Difference]: Start difference. First operand 157 states and 163 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:01,231 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2023-02-13 22:15:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 22:15:01,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 184 [2023-02-13 22:15:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:01,234 INFO L225 Difference]: With dead ends: 201 [2023-02-13 22:15:01,234 INFO L226 Difference]: Without dead ends: 169 [2023-02-13 22:15:01,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-13 22:15:01,235 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:01,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:15:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-13 22:15:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-13 22:15:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0548780487804879) internal successors, (173), 164 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-02-13 22:15:01,243 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 184 [2023-02-13 22:15:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:01,243 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-02-13 22:15:01,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-02-13 22:15:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-13 22:15:01,245 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:01,245 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 21, 21, 15, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:01,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:01,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-13 22:15:01,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 853335264, now seen corresponding path program 6 times [2023-02-13 22:15:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:01,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473409042] [2023-02-13 22:15:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:01,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:01,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107553548] [2023-02-13 22:15:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:15:01,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:01,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:01,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-13 22:15:01,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-13 22:15:01,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 22:15:01,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 3976 trivial. 0 not checked. [2023-02-13 22:15:01,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4308 trivial. 0 not checked. [2023-02-13 22:15:01,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473409042] [2023-02-13 22:15:01,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107553548] [2023-02-13 22:15:01,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107553548] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:01,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:01,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-13 22:15:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591284444] [2023-02-13 22:15:01,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:01,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-13 22:15:01,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-13 22:15:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-13 22:15:01,941 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:01,967 INFO L93 Difference]: Finished difference Result 213 states and 235 transitions. [2023-02-13 22:15:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 22:15:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 220 [2023-02-13 22:15:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:01,970 INFO L225 Difference]: With dead ends: 213 [2023-02-13 22:15:01,970 INFO L226 Difference]: Without dead ends: 181 [2023-02-13 22:15:01,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-13 22:15:01,971 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:01,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:15:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-13 22:15:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-13 22:15:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0511363636363635) internal successors, (185), 176 states have internal predecessors, (185), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2023-02-13 22:15:01,978 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 220 [2023-02-13 22:15:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:01,978 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2023-02-13 22:15:01,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2023-02-13 22:15:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-02-13 22:15:01,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:01,981 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 21, 21, 15, 10, 10, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:01,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:02,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-13 22:15:02,188 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:02,189 INFO L85 PathProgramCache]: Analyzing trace with hash -840128276, now seen corresponding path program 7 times [2023-02-13 22:15:02,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:02,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176054365] [2023-02-13 22:15:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:02,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:02,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:02,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043805534] [2023-02-13 22:15:02,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:15:02,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:02,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:02,234 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:02,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-13 22:15:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:15:02,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:15:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 157 proven. 7 refuted. 0 times theorem prover too weak. 4244 trivial. 0 not checked. [2023-02-13 22:15:02,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 37 proven. 337 refuted. 0 times theorem prover too weak. 4034 trivial. 0 not checked. [2023-02-13 22:15:02,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176054365] [2023-02-13 22:15:02,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:02,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043805534] [2023-02-13 22:15:02,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043805534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:02,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:02,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-02-13 22:15:02,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986512214] [2023-02-13 22:15:02,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:02,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 22:15:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 22:15:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-13 22:15:02,550 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:02,574 INFO L93 Difference]: Finished difference Result 249 states and 274 transitions. [2023-02-13 22:15:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 22:15:02,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 232 [2023-02-13 22:15:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:02,576 INFO L225 Difference]: With dead ends: 249 [2023-02-13 22:15:02,576 INFO L226 Difference]: Without dead ends: 193 [2023-02-13 22:15:02,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-13 22:15:02,577 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:02,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:15:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-13 22:15:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-13 22:15:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.047872340425532) internal successors, (197), 188 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2023-02-13 22:15:02,583 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 232 [2023-02-13 22:15:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:02,583 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2023-02-13 22:15:02,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2023-02-13 22:15:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-02-13 22:15:02,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:02,586 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 33, 33, 18, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:02,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:02,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:02,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1764241452, now seen corresponding path program 8 times [2023-02-13 22:15:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:02,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492928996] [2023-02-13 22:15:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:02,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:02,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:02,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402003887] [2023-02-13 22:15:02,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:15:02,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:02,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:02,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-13 22:15:03,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:15:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:15:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 549 proven. 57 refuted. 0 times theorem prover too weak. 4792 trivial. 0 not checked. [2023-02-13 22:15:03,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 93 proven. 835 refuted. 0 times theorem prover too weak. 4470 trivial. 0 not checked. [2023-02-13 22:15:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492928996] [2023-02-13 22:15:03,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402003887] [2023-02-13 22:15:03,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402003887] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:03,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:03,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-13 22:15:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761479821] [2023-02-13 22:15:03,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-13 22:15:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-13 22:15:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-13 22:15:03,299 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:03,345 INFO L93 Difference]: Finished difference Result 285 states and 314 transitions. [2023-02-13 22:15:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-13 22:15:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 268 [2023-02-13 22:15:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:03,347 INFO L225 Difference]: With dead ends: 285 [2023-02-13 22:15:03,347 INFO L226 Difference]: Without dead ends: 217 [2023-02-13 22:15:03,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-13 22:15:03,348 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:03,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:15:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-13 22:15:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-02-13 22:15:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 212 states have internal predecessors, (221), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2023-02-13 22:15:03,355 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 268 [2023-02-13 22:15:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:03,356 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2023-02-13 22:15:03,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2023-02-13 22:15:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-02-13 22:15:03,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:03,360 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 57, 57, 42, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:03,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-13 22:15:03,566 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1339400532, now seen corresponding path program 9 times [2023-02-13 22:15:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:03,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102993551] [2023-02-13 22:15:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:03,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:03,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:03,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460322420] [2023-02-13 22:15:03,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:15:03,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:03,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:03,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:03,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-13 22:15:04,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-13 22:15:04,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:15:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-02-13 22:15:04,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-02-13 22:15:04,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:04,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102993551] [2023-02-13 22:15:04,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:04,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460322420] [2023-02-13 22:15:04,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460322420] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:04,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:04,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-13 22:15:04,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376952586] [2023-02-13 22:15:04,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:04,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-13 22:15:04,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-13 22:15:04,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-13 22:15:04,389 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 22:15:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:04,439 INFO L93 Difference]: Finished difference Result 333 states and 370 transitions. [2023-02-13 22:15:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-13 22:15:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 340 [2023-02-13 22:15:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:04,441 INFO L225 Difference]: With dead ends: 333 [2023-02-13 22:15:04,441 INFO L226 Difference]: Without dead ends: 241 [2023-02-13 22:15:04,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-13 22:15:04,442 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:04,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:15:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-13 22:15:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-02-13 22:15:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0720338983050848) internal successors, (253), 236 states have internal predecessors, (253), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 259 transitions. [2023-02-13 22:15:04,450 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 259 transitions. Word has length 340 [2023-02-13 22:15:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:04,450 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 259 transitions. [2023-02-13 22:15:04,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 22:15:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 259 transitions. [2023-02-13 22:15:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-02-13 22:15:04,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:04,456 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 60, 60, 42, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:04,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:04,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-13 22:15:04,663 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1389660628, now seen corresponding path program 10 times [2023-02-13 22:15:04,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:04,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314621639] [2023-02-13 22:15:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:04,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:04,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861750714] [2023-02-13 22:15:04,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:15:04,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:04,726 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:04,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-13 22:15:05,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:15:05,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:05,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-13 22:15:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 6252 proven. 301 refuted. 0 times theorem prover too weak. 7125 trivial. 0 not checked. [2023-02-13 22:15:05,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 2802 proven. 2546 refuted. 0 times theorem prover too weak. 8330 trivial. 0 not checked. [2023-02-13 22:15:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314621639] [2023-02-13 22:15:05,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861750714] [2023-02-13 22:15:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861750714] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:05,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:05,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-02-13 22:15:05,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896699558] [2023-02-13 22:15:05,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-13 22:15:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-13 22:15:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-13 22:15:05,540 INFO L87 Difference]: Start difference. First operand 241 states and 259 transitions. Second operand has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:05,639 INFO L93 Difference]: Finished difference Result 405 states and 458 transitions. [2023-02-13 22:15:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-13 22:15:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 412 [2023-02-13 22:15:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:05,642 INFO L225 Difference]: With dead ends: 405 [2023-02-13 22:15:05,642 INFO L226 Difference]: Without dead ends: 289 [2023-02-13 22:15:05,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-13 22:15:05,643 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:05,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 147 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:15:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-13 22:15:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-02-13 22:15:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0598591549295775) internal successors, (301), 284 states have internal predecessors, (301), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 307 transitions. [2023-02-13 22:15:05,652 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 307 transitions. Word has length 412 [2023-02-13 22:15:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:05,653 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 307 transitions. [2023-02-13 22:15:05,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 307 transitions. [2023-02-13 22:15:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-02-13 22:15:05,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:05,661 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 90, 60, 60, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:05,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:05,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-13 22:15:05,871 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:05,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1144607532, now seen corresponding path program 11 times [2023-02-13 22:15:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:05,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958458392] [2023-02-13 22:15:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:05,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:05,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992061031] [2023-02-13 22:15:05,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:15:05,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:05,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:05,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-13 22:15:06,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-13 22:15:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:06,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-13 22:15:06,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 12531 proven. 301 refuted. 0 times theorem prover too weak. 16038 trivial. 0 not checked. [2023-02-13 22:15:06,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 1261 proven. 4121 refuted. 0 times theorem prover too weak. 23488 trivial. 0 not checked. [2023-02-13 22:15:06,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:06,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958458392] [2023-02-13 22:15:06,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992061031] [2023-02-13 22:15:06,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992061031] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:06,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:06,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2023-02-13 22:15:06,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432564836] [2023-02-13 22:15:06,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:06,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-13 22:15:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-13 22:15:06,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-13 22:15:06,717 INFO L87 Difference]: Start difference. First operand 289 states and 307 transitions. Second operand has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:06,819 INFO L93 Difference]: Finished difference Result 501 states and 570 transitions. [2023-02-13 22:15:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-13 22:15:06,820 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 556 [2023-02-13 22:15:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:06,822 INFO L225 Difference]: With dead ends: 501 [2023-02-13 22:15:06,822 INFO L226 Difference]: Without dead ends: 337 [2023-02-13 22:15:06,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1078 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-13 22:15:06,823 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:06,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:15:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-02-13 22:15:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2023-02-13 22:15:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0993975903614457) internal successors, (365), 332 states have internal predecessors, (365), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 371 transitions. [2023-02-13 22:15:06,833 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 371 transitions. Word has length 556 [2023-02-13 22:15:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:06,834 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 371 transitions. [2023-02-13 22:15:06,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 371 transitions. [2023-02-13 22:15:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2023-02-13 22:15:06,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:06,839 INFO L195 NwaCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:06,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:07,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-13 22:15:07,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash 832504364, now seen corresponding path program 12 times [2023-02-13 22:15:07,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:07,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795401434] [2023-02-13 22:15:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:07,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:07,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:07,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529897159] [2023-02-13 22:15:07,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:15:07,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:07,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:07,116 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:07,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-13 22:15:08,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-02-13 22:15:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 22:15:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 21132 proven. 100 refuted. 0 times theorem prover too weak. 29742 trivial. 0 not checked. [2023-02-13 22:15:08,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 50874 trivial. 0 not checked. [2023-02-13 22:15:08,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795401434] [2023-02-13 22:15:08,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529897159] [2023-02-13 22:15:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529897159] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:08,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:08,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-02-13 22:15:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467747005] [2023-02-13 22:15:08,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:08,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 22:15:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 22:15:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:15:08,451 INFO L87 Difference]: Start difference. First operand 337 states and 371 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:08,505 INFO L93 Difference]: Finished difference Result 549 states and 625 transitions. [2023-02-13 22:15:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 22:15:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 700 [2023-02-13 22:15:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:08,507 INFO L225 Difference]: With dead ends: 549 [2023-02-13 22:15:08,508 INFO L226 Difference]: Without dead ends: 361 [2023-02-13 22:15:08,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:15:08,509 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:08,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 128 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:15:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-02-13 22:15:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2023-02-13 22:15:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 356 states have (on average 1.0926966292134832) internal successors, (389), 356 states have internal predecessors, (389), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 395 transitions. [2023-02-13 22:15:08,519 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 395 transitions. Word has length 700 [2023-02-13 22:15:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:08,519 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 395 transitions. [2023-02-13 22:15:08,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 395 transitions. [2023-02-13 22:15:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-02-13 22:15:08,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:08,525 INFO L195 NwaCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:08,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:08,735 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 792981572, now seen corresponding path program 13 times [2023-02-13 22:15:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:08,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654218425] [2023-02-13 22:15:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:08,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:08,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:08,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724021759] [2023-02-13 22:15:08,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:15:08,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:08,802 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:08,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-13 22:15:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:15:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-13 22:15:09,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 13557 proven. 1365 refuted. 0 times theorem prover too weak. 36436 trivial. 0 not checked. [2023-02-13 22:15:09,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 2637 proven. 22495 refuted. 0 times theorem prover too weak. 26226 trivial. 0 not checked. [2023-02-13 22:15:10,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654218425] [2023-02-13 22:15:10,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724021759] [2023-02-13 22:15:10,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724021759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:10,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:10,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2023-02-13 22:15:10,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948422933] [2023-02-13 22:15:10,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:10,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-13 22:15:10,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-13 22:15:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 22:15:10,253 INFO L87 Difference]: Start difference. First operand 361 states and 395 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:10,356 INFO L93 Difference]: Finished difference Result 600 states and 670 transitions. [2023-02-13 22:15:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-13 22:15:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 724 [2023-02-13 22:15:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:10,359 INFO L225 Difference]: With dead ends: 600 [2023-02-13 22:15:10,359 INFO L226 Difference]: Without dead ends: 364 [2023-02-13 22:15:10,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1384 SyntacticMatches, 31 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 22:15:10,360 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:10,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 123 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:15:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-13 22:15:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-02-13 22:15:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.0919220055710306) internal successors, (392), 359 states have internal predecessors, (392), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 398 transitions. [2023-02-13 22:15:10,370 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 398 transitions. Word has length 724 [2023-02-13 22:15:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:10,371 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 398 transitions. [2023-02-13 22:15:10,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 22:15:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 398 transitions. [2023-02-13 22:15:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2023-02-13 22:15:10,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:10,376 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:10,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:10,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:10,585 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash -91827407, now seen corresponding path program 14 times [2023-02-13 22:15:10,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:10,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644151637] [2023-02-13 22:15:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:10,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:10,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:10,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854857897] [2023-02-13 22:15:10,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:15:10,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:10,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:10,649 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:10,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-13 22:15:11,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:15:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:15:11,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-13 22:15:11,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:15:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 21850 proven. 484 refuted. 0 times theorem prover too weak. 30635 trivial. 0 not checked. [2023-02-13 22:15:11,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:15:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52485 trivial. 0 not checked. [2023-02-13 22:15:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:15:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644151637] [2023-02-13 22:15:11,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:15:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854857897] [2023-02-13 22:15:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854857897] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:15:11,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:15:11,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-02-13 22:15:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845782785] [2023-02-13 22:15:11,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:15:11,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-13 22:15:11,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:15:11,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-13 22:15:11,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 22:15:11,957 INFO L87 Difference]: Start difference. First operand 364 states and 398 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:15:12,054 INFO L93 Difference]: Finished difference Result 603 states and 691 transitions. [2023-02-13 22:15:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-13 22:15:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 733 [2023-02-13 22:15:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:15:12,063 INFO L225 Difference]: With dead ends: 603 [2023-02-13 22:15:12,064 INFO L226 Difference]: Without dead ends: 412 [2023-02-13 22:15:12,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1464 GetRequests, 1418 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 22:15:12,065 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:15:12,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:15:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-13 22:15:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2023-02-13 22:15:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.0810810810810811) internal successors, (440), 407 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:15:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2023-02-13 22:15:12,076 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 733 [2023-02-13 22:15:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:15:12,077 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2023-02-13 22:15:12,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:15:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2023-02-13 22:15:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2023-02-13 22:15:12,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:15:12,083 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 46, 46, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:15:12,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-13 22:15:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:12,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:15:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:15:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1952749311, now seen corresponding path program 15 times [2023-02-13 22:15:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:15:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322584676] [2023-02-13 22:15:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:15:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:15:12,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:15:12,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583644996] [2023-02-13 22:15:12,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:15:12,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:15:12,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:15:12,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:15:12,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process