./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/nsqm-if.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:35:28,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:35:28,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:35:28,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:35:28,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:35:28,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:35:28,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:35:28,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:35:28,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:35:28,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:35:28,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:35:28,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:35:28,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:35:28,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:35:28,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:35:28,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:35:28,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:35:28,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:35:28,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:35:28,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:35:28,937 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:35:28,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:35:28,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:35:28,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:35:28,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:35:28,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:35:28,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:35:28,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:35:28,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:35:28,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:35:28,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:35:28,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:35:28,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:35:28,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:35:28,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:35:28,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:35:28,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:35:28,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:35:28,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:35:28,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:35:28,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:35:28,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:35:28,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:35:28,987 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:35:28,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:35:28,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:35:28,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:35:28,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:35:28,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:35:28,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:35:28,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:35:28,990 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:35:28,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:35:28,991 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:35:28,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:35:28,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:35:28,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:35:28,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:35:28,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:35:28,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:35:28,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:35:28,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:35:28,993 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:35:28,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:35:28,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:35:28,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:35:28,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:35:28,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:35:28,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:35:28,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:35:28,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:35:28,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:35:28,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:35:28,995 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:35:28,996 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:35:28,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:35:28,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2022-07-19 10:35:29,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:35:29,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:35:29,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:35:29,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:35:29,269 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:35:29,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm-if.c [2022-07-19 10:35:29,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4eb120b8/9ffabdd247e942d492a2f237ed3bf9b0/FLAGe53c8ba12 [2022-07-19 10:35:29,733 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:35:29,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-if.c [2022-07-19 10:35:29,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4eb120b8/9ffabdd247e942d492a2f237ed3bf9b0/FLAGe53c8ba12 [2022-07-19 10:35:30,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4eb120b8/9ffabdd247e942d492a2f237ed3bf9b0 [2022-07-19 10:35:30,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:35:30,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:35:30,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:35:30,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:35:30,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:35:30,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b05d5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30, skipping insertion in model container [2022-07-19 10:35:30,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:35:30,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:35:30,265 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-07-19 10:35:30,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:35:30,308 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:35:30,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-07-19 10:35:30,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:35:30,335 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:35:30,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30 WrapperNode [2022-07-19 10:35:30,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:35:30,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:35:30,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:35:30,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:35:30,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,362 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-19 10:35:30,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:35:30,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:35:30,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:35:30,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:35:30,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:35:30,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:35:30,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:35:30,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:35:30,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (1/1) ... [2022-07-19 10:35:30,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:35:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:30,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:35:30,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:35:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:35:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:35:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:35:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:35:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:35:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:35:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:35:30,508 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:35:30,509 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:35:30,623 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:35:30,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:35:30,629 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 10:35:30,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:35:30 BoogieIcfgContainer [2022-07-19 10:35:30,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:35:30,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:35:30,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:35:30,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:35:30,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:35:30" (1/3) ... [2022-07-19 10:35:30,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294f9792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:35:30, skipping insertion in model container [2022-07-19 10:35:30,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:30" (2/3) ... [2022-07-19 10:35:30,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294f9792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:35:30, skipping insertion in model container [2022-07-19 10:35:30,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:35:30" (3/3) ... [2022-07-19 10:35:30,637 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2022-07-19 10:35:30,649 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:35:30,649 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:35:30,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:35:30,693 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6aebd090, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2bda026e [2022-07-19 10:35:30,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:35:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:35:30,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:30,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:30,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-07-19 10:35:30,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:30,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45083201] [2022-07-19 10:35:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:30,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:30,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45083201] [2022-07-19 10:35:30,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45083201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:35:30,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:35:30,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:35:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467151862] [2022-07-19 10:35:30,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:35:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:35:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:35:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:35:30,934 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:30,946 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-07-19 10:35:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:35:30,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:35:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:30,953 INFO L225 Difference]: With dead ends: 42 [2022-07-19 10:35:30,954 INFO L226 Difference]: Without dead ends: 19 [2022-07-19 10:35:30,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:35:30,966 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:30,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:35:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-19 10:35:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-19 10:35:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-19 10:35:31,008 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-07-19 10:35:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:31,008 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-19 10:35:31,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-19 10:35:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:35:31,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:31,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:31,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:35:31,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-07-19 10:35:31,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:31,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946718107] [2022-07-19 10:35:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:31,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:31,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:31,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946718107] [2022-07-19 10:35:31,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946718107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:35:31,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:35:31,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:35:31,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606614679] [2022-07-19 10:35:31,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:35:31,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:35:31,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:31,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:35:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:35:31,112 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:31,188 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-07-19 10:35:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:35:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:35:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:31,189 INFO L225 Difference]: With dead ends: 45 [2022-07-19 10:35:31,190 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 10:35:31,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:35:31,192 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:31,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:35:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 10:35:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-07-19 10:35:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 10:35:31,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-19 10:35:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:31,199 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 10:35:31,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 10:35:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:35:31,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:31,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:31,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:35:31,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-07-19 10:35:31,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:31,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409159494] [2022-07-19 10:35:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:31,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:31,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:31,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001070252] [2022-07-19 10:35:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:31,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:31,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:31,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:31,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:35:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:31,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 10:35:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:31,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:35:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:35:31,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:35:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:31,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409159494] [2022-07-19 10:35:31,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:31,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001070252] [2022-07-19 10:35:31,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001070252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:35:31,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:35:31,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:35:31,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205051768] [2022-07-19 10:35:31,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:35:31,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:35:31,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:35:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:35:31,481 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:31,587 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-07-19 10:35:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:35:31,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-19 10:35:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:31,589 INFO L225 Difference]: With dead ends: 40 [2022-07-19 10:35:31,589 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 10:35:31,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:35:31,591 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:31,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:35:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 10:35:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-19 10:35:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-19 10:35:31,597 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-07-19 10:35:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:31,597 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-19 10:35:31,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:31,598 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-19 10:35:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 10:35:31,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:31,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:31,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:31,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:31,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-07-19 10:35:31,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:31,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830083610] [2022-07-19 10:35:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:31,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:31,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:31,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989482247] [2022-07-19 10:35:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:31,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:31,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:31,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:31,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:35:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:35:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:31,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:31,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830083610] [2022-07-19 10:35:31,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989482247] [2022-07-19 10:35:31,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989482247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:31,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:31,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:35:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15529007] [2022-07-19 10:35:31,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:35:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:35:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:35:31,988 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:32,127 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-07-19 10:35:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:35:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 10:35:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:32,129 INFO L225 Difference]: With dead ends: 70 [2022-07-19 10:35:32,129 INFO L226 Difference]: Without dead ends: 43 [2022-07-19 10:35:32,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:35:32,130 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:32,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:35:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-19 10:35:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-07-19 10:35:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-19 10:35:32,135 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-19 10:35:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:32,135 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-19 10:35:32,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-19 10:35:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:35:32,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:32,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:32,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:32,348 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,SelfDestructingSolverStorable3 [2022-07-19 10:35:32,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-07-19 10:35:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:32,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743897060] [2022-07-19 10:35:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:32,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:32,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:32,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269701203] [2022-07-19 10:35:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:32,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:32,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:32,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:35:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 10:35:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:32,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:35:32,552 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-19 10:35:32,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:35:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:35:32,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:32,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-07-19 10:35:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 10:35:32,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743897060] [2022-07-19 10:35:32,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269701203] [2022-07-19 10:35:32,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269701203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:32,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:32,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2022-07-19 10:35:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314458371] [2022-07-19 10:35:32,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:32,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:35:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:35:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:35:32,809 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:32,959 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-19 10:35:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:35:32,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:35:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:32,960 INFO L225 Difference]: With dead ends: 73 [2022-07-19 10:35:32,960 INFO L226 Difference]: Without dead ends: 61 [2022-07-19 10:35:32,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:35:32,962 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:32,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 67 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 83 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-07-19 10:35:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-19 10:35:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2022-07-19 10:35:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-07-19 10:35:32,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2022-07-19 10:35:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:32,969 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-07-19 10:35:32,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-07-19 10:35:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:35:32,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:32,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:32,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:33,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:33,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:33,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-07-19 10:35:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475089126] [2022-07-19 10:35:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:33,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:33,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:33,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036416185] [2022-07-19 10:35:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:33,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:33,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:33,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:33,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:35:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 10:35:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:33,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:35:33,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 10:35:33,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:33,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 10:35:33,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 10:35:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:33,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-07-19 10:35:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:33,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:34,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:34,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475089126] [2022-07-19 10:35:34,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:34,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036416185] [2022-07-19 10:35:34,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036416185] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:34,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:34,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-07-19 10:35:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004786977] [2022-07-19 10:35:34,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:34,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 10:35:34,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:34,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 10:35:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-19 10:35:34,514 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:36,679 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2022-07-19 10:35:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 10:35:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:35:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:36,685 INFO L225 Difference]: With dead ends: 115 [2022-07-19 10:35:36,685 INFO L226 Difference]: Without dead ends: 84 [2022-07-19 10:35:36,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:35:36,686 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:36,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 63 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 182 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-07-19 10:35:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-19 10:35:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2022-07-19 10:35:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-19 10:35:36,696 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 28 [2022-07-19 10:35:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:36,697 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-19 10:35:36,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-19 10:35:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:35:36,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:36,698 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:36,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:36,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:36,912 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash -849177916, now seen corresponding path program 2 times [2022-07-19 10:35:36,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368489678] [2022-07-19 10:35:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:36,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:36,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:36,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136804089] [2022-07-19 10:35:36,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:35:36,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:36,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:36,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:36,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:35:37,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:35:37,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:35:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 10:35:37,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:35:37,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368489678] [2022-07-19 10:35:37,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136804089] [2022-07-19 10:35:37,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136804089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:35:37,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:35:37,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:35:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772246923] [2022-07-19 10:35:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:35:37,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:35:37,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:35:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:35:37,047 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:37,096 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2022-07-19 10:35:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:35:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 10:35:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:37,098 INFO L225 Difference]: With dead ends: 111 [2022-07-19 10:35:37,098 INFO L226 Difference]: Without dead ends: 80 [2022-07-19 10:35:37,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:35:37,099 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:37,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:35:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-19 10:35:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-07-19 10:35:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-19 10:35:37,109 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 30 [2022-07-19 10:35:37,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:37,109 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-19 10:35:37,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-19 10:35:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:35:37,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:37,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:37,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:37,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1242204926, now seen corresponding path program 3 times [2022-07-19 10:35:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:37,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738847368] [2022-07-19 10:35:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:37,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:37,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401843646] [2022-07-19 10:35:37,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:35:37,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:37,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:37,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:35:37,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 10:35:37,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:35:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 10:35:37,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 10:35:37,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:37,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738847368] [2022-07-19 10:35:37,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:37,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401843646] [2022-07-19 10:35:37,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401843646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:37,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:37,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-07-19 10:35:37,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616472896] [2022-07-19 10:35:37,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:37,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 10:35:37,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 10:35:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:35:37,786 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:38,050 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2022-07-19 10:35:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 10:35:38,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 10:35:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:38,051 INFO L225 Difference]: With dead ends: 133 [2022-07-19 10:35:38,051 INFO L226 Difference]: Without dead ends: 113 [2022-07-19 10:35:38,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:35:38,053 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 252 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:38,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 100 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:35:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-19 10:35:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2022-07-19 10:35:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-07-19 10:35:38,062 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 30 [2022-07-19 10:35:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:38,063 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-07-19 10:35:38,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-07-19 10:35:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:35:38,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:38,064 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:38,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:38,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:38,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2022-07-19 10:35:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40043144] [2022-07-19 10:35:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:38,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:38,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:38,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82700098] [2022-07-19 10:35:38,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:35:38,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:38,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:38,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:38,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:35:38,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:35:38,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:35:38,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 10:35:38,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 10:35:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40043144] [2022-07-19 10:35:38,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82700098] [2022-07-19 10:35:38,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82700098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:38,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:38,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-19 10:35:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997626187] [2022-07-19 10:35:38,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:38,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:35:38,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:35:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:35:38,523 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:38,668 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-07-19 10:35:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:35:38,668 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 10:35:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:38,669 INFO L225 Difference]: With dead ends: 102 [2022-07-19 10:35:38,669 INFO L226 Difference]: Without dead ends: 77 [2022-07-19 10:35:38,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:35:38,670 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:38,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 71 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:35:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-19 10:35:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-07-19 10:35:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-07-19 10:35:38,685 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 32 [2022-07-19 10:35:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:38,685 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-07-19 10:35:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-07-19 10:35:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:35:38,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:38,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:38,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 10:35:38,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:38,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1847758638, now seen corresponding path program 4 times [2022-07-19 10:35:38,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:38,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524245273] [2022-07-19 10:35:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:38,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:38,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657245072] [2022-07-19 10:35:38,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:35:38,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:38,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:38,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:35:38,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:35:38,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:35:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:39,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:39,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524245273] [2022-07-19 10:35:39,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657245072] [2022-07-19 10:35:39,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657245072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:39,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:39,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-19 10:35:39,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786114823] [2022-07-19 10:35:39,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:39,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:35:39,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:35:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:35:39,142 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:39,358 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-07-19 10:35:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 10:35:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 10:35:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:39,359 INFO L225 Difference]: With dead ends: 116 [2022-07-19 10:35:39,359 INFO L226 Difference]: Without dead ends: 103 [2022-07-19 10:35:39,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:35:39,360 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 135 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:39,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 113 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:35:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-19 10:35:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2022-07-19 10:35:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-07-19 10:35:39,367 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 33 [2022-07-19 10:35:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:39,368 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-07-19 10:35:39,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-07-19 10:35:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:35:39,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:39,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:39,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:39,569 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,SelfDestructingSolverStorable9 [2022-07-19 10:35:39,569 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2022-07-19 10:35:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:39,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103595063] [2022-07-19 10:35:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:39,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:39,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:39,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121157152] [2022-07-19 10:35:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:35:39,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:39,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:39,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:35:39,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 10:35:39,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:39,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-19 10:35:39,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:39,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:35:39,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 10:35:39,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:39,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:35:40,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:35:40,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 10:35:40,276 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-19 10:35:40,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 143 treesize of output 131 [2022-07-19 10:35:40,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:35:40,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 198 [2022-07-19 10:35:40,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 10:35:40,514 INFO L356 Elim1Store]: treesize reduction 32, result has 13.5 percent of original size [2022-07-19 10:35:40,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 140 [2022-07-19 10:35:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:40,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-07-19 10:35:40,897 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:35:40,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 40 [2022-07-19 10:35:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:40,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:43,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103595063] [2022-07-19 10:35:43,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:43,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121157152] [2022-07-19 10:35:43,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121157152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:43,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:43,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2022-07-19 10:35:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015066476] [2022-07-19 10:35:43,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 10:35:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 10:35:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 10:35:43,484 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:45,261 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-07-19 10:35:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 10:35:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 10:35:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:45,262 INFO L225 Difference]: With dead ends: 97 [2022-07-19 10:35:45,262 INFO L226 Difference]: Without dead ends: 95 [2022-07-19 10:35:45,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=604, Invalid=2476, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 10:35:45,264 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:45,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 92 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 197 Invalid, 0 Unknown, 288 Unchecked, 0.2s Time] [2022-07-19 10:35:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-19 10:35:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-07-19 10:35:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 85 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-07-19 10:35:45,275 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 34 [2022-07-19 10:35:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:45,276 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-07-19 10:35:45,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-07-19 10:35:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:35:45,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:45,277 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:45,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:45,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:45,501 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash -653025448, now seen corresponding path program 4 times [2022-07-19 10:35:45,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:45,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590172532] [2022-07-19 10:35:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:45,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:45,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597843227] [2022-07-19 10:35:45,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:35:45,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:45,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:45,538 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:45,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:35:45,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:35:45,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 10:35:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:35:45,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:35:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590172532] [2022-07-19 10:35:45,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597843227] [2022-07-19 10:35:45,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597843227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:45,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:45,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-19 10:35:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256220709] [2022-07-19 10:35:45,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:35:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:35:45,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:35:45,746 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:46,026 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-07-19 10:35:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 10:35:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 10:35:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:46,027 INFO L225 Difference]: With dead ends: 120 [2022-07-19 10:35:46,027 INFO L226 Difference]: Without dead ends: 99 [2022-07-19 10:35:46,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:35:46,028 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 147 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:46,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 112 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:35:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-19 10:35:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2022-07-19 10:35:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-19 10:35:46,039 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 34 [2022-07-19 10:35:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:46,041 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-19 10:35:46,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-19 10:35:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 10:35:46,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:46,043 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:46,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:46,251 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,SelfDestructingSolverStorable11 [2022-07-19 10:35:46,252 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:46,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1259217666, now seen corresponding path program 5 times [2022-07-19 10:35:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372796999] [2022-07-19 10:35:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:46,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626106969] [2022-07-19 10:35:46,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:35:46,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:46,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:46,275 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:46,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:35:46,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:35:46,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:46,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 10:35:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:46,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:35:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:47,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:35:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:47,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:35:47,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:47,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:35:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:35:47,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 10:35:47,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372796999] [2022-07-19 10:35:47,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626106969] [2022-07-19 10:35:47,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626106969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:47,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:47,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-07-19 10:35:47,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800715244] [2022-07-19 10:35:47,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:47,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:35:47,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:47,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:35:47,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:35:47,626 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:47,944 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2022-07-19 10:35:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:35:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-19 10:35:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:47,945 INFO L225 Difference]: With dead ends: 119 [2022-07-19 10:35:47,945 INFO L226 Difference]: Without dead ends: 117 [2022-07-19 10:35:47,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:35:47,946 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 107 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:47,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 150 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 252 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2022-07-19 10:35:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-19 10:35:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2022-07-19 10:35:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-07-19 10:35:47,956 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 36 [2022-07-19 10:35:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:47,956 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-07-19 10:35:47,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-07-19 10:35:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:35:47,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:47,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:47,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:48,163 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,SelfDestructingSolverStorable12 [2022-07-19 10:35:48,163 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2022-07-19 10:35:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894317689] [2022-07-19 10:35:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:48,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:48,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659813456] [2022-07-19 10:35:48,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:35:48,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:48,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:35:48,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:35:48,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 10:35:48,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:35:48,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 10:35:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:48,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:35:48,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 10:35:48,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-19 10:35:48,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:35:48,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-19 10:35:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-07-19 10:35:48,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:48,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-19 10:35:49,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 141 [2022-07-19 10:35:49,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:35:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 201 [2022-07-19 10:35:49,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 39 [2022-07-19 10:35:49,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:35:49,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:35:49,191 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:35:49,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 60 [2022-07-19 10:35:49,471 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-19 10:35:49,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 44 [2022-07-19 10:35:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:49,486 INFO L328 TraceCheckSpWp]: Computing backward predicates...