./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/rev-3-u.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-multidimensional/rev-3-u.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 fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:06:23,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:06:23,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:06:23,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:06:23,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:06:23,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:06:23,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:06:23,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:06:23,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:06:23,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:06:23,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:06:23,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:06:23,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:06:23,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:06:23,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:06:23,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:06:23,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:06:23,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:06:23,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:06:23,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:06:23,126 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:06:23,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:06:23,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:06:23,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:06:23,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:06:23,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:06:23,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:06:23,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:06:23,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:06:23,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:06:23,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:06:23,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:06:23,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:06:23,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:06:23,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:06:23,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:06:23,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:06:23,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:06:23,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:06:23,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:06:23,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:06:23,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:06:23,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:06:23,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:06:23,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:06:23,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:06:23,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:06:23,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:06:23,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:06:23,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:06:23,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:06:23,186 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:06:23,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:06:23,187 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:06:23,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:06:23,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:06:23,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:06:23,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:06:23,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:06:23,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:06:23,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:06:23,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:06:23,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:06:23,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:06:23,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:06:23,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:06:23,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:06:23,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:06:23,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:06:23,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:06:23,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:06:23,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:06:23,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:06:23,191 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:06:23,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:06:23,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:06:23,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 [2022-07-19 10:06:23,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:06:23,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:06:23,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:06:23,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:06:23,466 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:06:23,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/rev-3-u.c [2022-07-19 10:06:23,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/449d7efb5/c028929d6d7640018b72a9e7e8576d55/FLAG63b841def [2022-07-19 10:06:23,947 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:06:23,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/rev-3-u.c [2022-07-19 10:06:23,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/449d7efb5/c028929d6d7640018b72a9e7e8576d55/FLAG63b841def [2022-07-19 10:06:24,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/449d7efb5/c028929d6d7640018b72a9e7e8576d55 [2022-07-19 10:06:24,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:06:24,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:06:24,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:06:24,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:06:24,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:06:24,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d627d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24, skipping insertion in model container [2022-07-19 10:06:24,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:06:24,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:06:24,475 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-multidimensional/rev-3-u.c[319,332] [2022-07-19 10:06:24,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:06:24,527 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:06:24,537 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-multidimensional/rev-3-u.c[319,332] [2022-07-19 10:06:24,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:06:24,560 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:06:24,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24 WrapperNode [2022-07-19 10:06:24,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:06:24,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:06:24,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:06:24,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:06:24,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,594 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 106 [2022-07-19 10:06:24,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:06:24,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:06:24,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:06:24,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:06:24,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:06:24,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:06:24,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:06:24,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:06:24,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (1/1) ... [2022-07-19 10:06:24,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:06:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:24,650 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 10:06:24,664 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 10:06:24,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:06:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:06:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:06:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:06:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:06:24,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:06:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:06:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:06:24,747 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:06:24,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:06:24,930 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:06:24,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:06:24,936 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-19 10:06:24,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:06:24 BoogieIcfgContainer [2022-07-19 10:06:24,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:06:24,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:06:24,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:06:24,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:06:24,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:06:24" (1/3) ... [2022-07-19 10:06:24,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de32189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:06:24, skipping insertion in model container [2022-07-19 10:06:24,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:06:24" (2/3) ... [2022-07-19 10:06:24,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de32189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:06:24, skipping insertion in model container [2022-07-19 10:06:24,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:06:24" (3/3) ... [2022-07-19 10:06:24,946 INFO L111 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2022-07-19 10:06:24,959 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:06:24,960 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:06:25,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:06:25,042 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@2b56a75d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1388326 [2022-07-19 10:06:25,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:06:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 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 10:06:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:06:25,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:25,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:25,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2022-07-19 10:06:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539012280] [2022-07-19 10:06:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:25,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:25,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:25,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22299994] [2022-07-19 10:06:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:25,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:25,196 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 10:06:25,231 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 10:06:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:06:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 10:06:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:25,312 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 10:06:25,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:06:25,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539012280] [2022-07-19 10:06:25,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22299994] [2022-07-19 10:06:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22299994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:06:25,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:06:25,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:06:25,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023086663] [2022-07-19 10:06:25,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:06:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:06:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:25,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:06:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:06:25,367 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:25,387 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2022-07-19 10:06:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:06:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:06:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:25,396 INFO L225 Difference]: With dead ends: 52 [2022-07-19 10:06:25,396 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 10:06:25,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:06:25,407 INFO L413 NwaCegarLoop]: 35 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, 35 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 10:06:25,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:06:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 10:06:25,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 10:06:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 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 10:06:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-07-19 10:06:25,440 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2022-07-19 10:06:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:25,441 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-07-19 10:06:25,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-07-19 10:06:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:06:25,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:25,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:25,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 10:06:25,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-19 10:06:25,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2022-07-19 10:06:25,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816694586] [2022-07-19 10:06:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:25,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:25,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:25,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433329026] [2022-07-19 10:06:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:25,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:25,681 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 10:06:25,716 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 10:06:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:06:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:06:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:25,847 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 10:06:25,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:06:25,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816694586] [2022-07-19 10:06:25,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433329026] [2022-07-19 10:06:25,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433329026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:06:25,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:06:25,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:06:25,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879850046] [2022-07-19 10:06:25,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:06:25,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:06:25,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:06:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:06:25,857 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:25,915 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-07-19 10:06:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:06:25,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:06:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:25,921 INFO L225 Difference]: With dead ends: 44 [2022-07-19 10:06:25,921 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 10:06:25,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:06:25,924 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:25,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:06:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 10:06:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-19 10:06:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-19 10:06:25,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2022-07-19 10:06:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:25,939 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-19 10:06:25,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-19 10:06:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:06:25,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:25,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:25,967 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 10:06:26,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-19 10:06:26,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2022-07-19 10:06:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:26,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460299161] [2022-07-19 10:06:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:26,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:26,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537331213] [2022-07-19 10:06:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:26,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:26,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:26,185 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 10:06:26,186 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 10:06:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:06:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:06:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:06:26,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:06:26,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460299161] [2022-07-19 10:06:26,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537331213] [2022-07-19 10:06:26,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537331213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:06:26,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:06:26,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:06:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331552506] [2022-07-19 10:06:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:06:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:06:26,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:06:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:06:26,286 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:26,386 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2022-07-19 10:06:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:06:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:06:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:26,387 INFO L225 Difference]: With dead ends: 61 [2022-07-19 10:06:26,387 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 10:06:26,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 10:06:26,389 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:26,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:06:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 10:06:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-07-19 10:06:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 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 10:06:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-07-19 10:06:26,395 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2022-07-19 10:06:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:26,396 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-07-19 10:06:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-07-19 10:06:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 10:06:26,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:26,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:26,427 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 10:06:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:26,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2022-07-19 10:06:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:26,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899068955] [2022-07-19 10:06:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:26,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:26,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658413412] [2022-07-19 10:06:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:26,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:26,642 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 10:06:26,652 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 10:06:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:06:26,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:06:26,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:06:26,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:06:26,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:26,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899068955] [2022-07-19 10:06:26,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:26,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658413412] [2022-07-19 10:06:26,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658413412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:06:26,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:06:26,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:06:26,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138945738] [2022-07-19 10:06:26,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:06:26,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:06:26,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:06:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:06:26,732 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:06:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:26,799 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2022-07-19 10:06:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:06:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-07-19 10:06:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:26,800 INFO L225 Difference]: With dead ends: 61 [2022-07-19 10:06:26,800 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:06:26,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 10:06:26,801 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:26,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:06:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:06:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-19 10:06:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-19 10:06:26,811 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-07-19 10:06:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:26,812 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-19 10:06:26,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:06:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-19 10:06:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:06:26,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:26,813 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 10:06:26,831 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 10:06:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:27,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2022-07-19 10:06:27,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:27,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065085122] [2022-07-19 10:06:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:27,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:27,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:27,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136778823] [2022-07-19 10:06:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:27,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:27,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:27,027 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 10:06:27,047 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 10:06:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:06:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:06:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:06:27,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:06:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:06:27,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065085122] [2022-07-19 10:06:27,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136778823] [2022-07-19 10:06:27,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136778823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:06:27,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:06:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 10:06:27,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916859410] [2022-07-19 10:06:27,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:06:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:06:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:06:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:06:27,159 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 10:06:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:27,284 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2022-07-19 10:06:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:06:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) Word has length 18 [2022-07-19 10:06:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:27,285 INFO L225 Difference]: With dead ends: 81 [2022-07-19 10:06:27,286 INFO L226 Difference]: Without dead ends: 54 [2022-07-19 10:06:27,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:06:27,287 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:27,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 43 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:06:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-19 10:06:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-07-19 10:06:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-07-19 10:06:27,297 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 18 [2022-07-19 10:06:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:27,297 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-07-19 10:06:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 10:06:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-07-19 10:06:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 10:06:27,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:27,299 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:27,322 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 10:06:27,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:27,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash 988124671, now seen corresponding path program 2 times [2022-07-19 10:06:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:27,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501839360] [2022-07-19 10:06:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:27,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343777383] [2022-07-19 10:06:27,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:06:27,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:27,536 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 10:06:27,550 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 10:06:27,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 10:06:27,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:06:27,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:06:27,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:06:27,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:06:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501839360] [2022-07-19 10:06:27,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:27,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343777383] [2022-07-19 10:06:27,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343777383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:06:27,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:06:27,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:06:27,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305057703] [2022-07-19 10:06:27,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:06:27,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:06:27,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:06:27,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:06:27,623 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 10:06:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:27,693 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-07-19 10:06:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:06:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 21 [2022-07-19 10:06:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:27,700 INFO L225 Difference]: With dead ends: 105 [2022-07-19 10:06:27,700 INFO L226 Difference]: Without dead ends: 84 [2022-07-19 10:06:27,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 10:06:27,703 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:27,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:06:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-19 10:06:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2022-07-19 10:06:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 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 10:06:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-07-19 10:06:27,728 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-07-19 10:06:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:27,728 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-07-19 10:06:27,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 10:06:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-07-19 10:06:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 10:06:27,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:27,735 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:27,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 10:06:27,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:27,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 1 times [2022-07-19 10:06:27,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:27,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935182592] [2022-07-19 10:06:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:27,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:27,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:27,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830044171] [2022-07-19 10:06:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:27,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:27,972 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 10:06:27,978 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 10:06:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:06:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:06:28,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:06:28,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:06:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:06:28,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935182592] [2022-07-19 10:06:28,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:28,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830044171] [2022-07-19 10:06:28,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830044171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:06:28,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:06:28,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-19 10:06:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929843495] [2022-07-19 10:06:28,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:06:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:06:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:06:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:06:28,160 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:28,403 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2022-07-19 10:06:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:06:28,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-19 10:06:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:28,404 INFO L225 Difference]: With dead ends: 138 [2022-07-19 10:06:28,404 INFO L226 Difference]: Without dead ends: 95 [2022-07-19 10:06:28,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:06:28,405 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 149 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:28,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 49 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:06:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-19 10:06:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2022-07-19 10:06:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-07-19 10:06:28,418 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2022-07-19 10:06:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:28,418 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-07-19 10:06:28,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-07-19 10:06:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:06:28,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:28,420 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:28,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:06:28,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:28,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:28,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:28,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2141491421, now seen corresponding path program 2 times [2022-07-19 10:06:28,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:28,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49025437] [2022-07-19 10:06:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:28,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:28,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:28,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198488416] [2022-07-19 10:06:28,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:06:28,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:28,668 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 10:06:28,693 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 10:06:28,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:06:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:06:28,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:06:28,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-19 10:06:28,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:06:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-19 10:06:29,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:29,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49025437] [2022-07-19 10:06:29,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198488416] [2022-07-19 10:06:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198488416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:06:29,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:06:29,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-19 10:06:29,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875261959] [2022-07-19 10:06:29,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:06:29,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 10:06:29,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 10:06:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:06:29,123 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:29,655 INFO L93 Difference]: Finished difference Result 252 states and 313 transitions. [2022-07-19 10:06:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:06:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 10:06:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:29,657 INFO L225 Difference]: With dead ends: 252 [2022-07-19 10:06:29,657 INFO L226 Difference]: Without dead ends: 179 [2022-07-19 10:06:29,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:06:29,658 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 418 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:29,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 91 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:06:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-19 10:06:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 136. [2022-07-19 10:06:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2222222222222223) internal successors, (165), 135 states have internal predecessors, (165), 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 10:06:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2022-07-19 10:06:29,677 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 43 [2022-07-19 10:06:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:29,677 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2022-07-19 10:06:29,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2022-07-19 10:06:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 10:06:29,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:29,679 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:29,707 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 10:06:29,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 10:06:29,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash 587853597, now seen corresponding path program 3 times [2022-07-19 10:06:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733427871] [2022-07-19 10:06:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:29,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:29,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102998379] [2022-07-19 10:06:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:06:29,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:29,924 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 10:06:29,951 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 10:06:30,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 10:06:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:06:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:06:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-07-19 10:06:30,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:06:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-07-19 10:06:30,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:30,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733427871] [2022-07-19 10:06:30,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:30,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102998379] [2022-07-19 10:06:30,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102998379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:06:30,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:06:30,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 10:06:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105198946] [2022-07-19 10:06:30,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:06:30,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:06:30,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:06:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:06:30,227 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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 10:06:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:30,401 INFO L93 Difference]: Finished difference Result 632 states and 774 transitions. [2022-07-19 10:06:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:06:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-19 10:06:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:30,406 INFO L225 Difference]: With dead ends: 632 [2022-07-19 10:06:30,406 INFO L226 Difference]: Without dead ends: 527 [2022-07-19 10:06:30,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:06:30,411 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:30,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:06:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-19 10:06:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 304. [2022-07-19 10:06:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1386138613861385) internal successors, (345), 303 states have internal predecessors, (345), 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 10:06:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 345 transitions. [2022-07-19 10:06:30,461 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 345 transitions. Word has length 67 [2022-07-19 10:06:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:30,462 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 345 transitions. [2022-07-19 10:06:30,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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 10:06:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 345 transitions. [2022-07-19 10:06:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-19 10:06:30,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:30,475 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:30,495 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 10:06:30,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:30,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1854973743, now seen corresponding path program 4 times [2022-07-19 10:06:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112969699] [2022-07-19 10:06:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:30,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:30,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382433750] [2022-07-19 10:06:30,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:06:30,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:30,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:30,779 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 10:06:30,806 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 10:06:31,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:06:31,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:06:31,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:06:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:06:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8472 backedges. 196 proven. 1603 refuted. 0 times theorem prover too weak. 6673 trivial. 0 not checked. [2022-07-19 10:06:31,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:06:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8472 backedges. 196 proven. 1603 refuted. 0 times theorem prover too weak. 6673 trivial. 0 not checked. [2022-07-19 10:06:31,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:06:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112969699] [2022-07-19 10:06:31,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:06:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382433750] [2022-07-19 10:06:31,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382433750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:06:31,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:06:31,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:06:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776168242] [2022-07-19 10:06:31,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:06:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:06:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:06:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:06:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:06:31,403 INFO L87 Difference]: Start difference. First operand 304 states and 345 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:06:31,643 INFO L93 Difference]: Finished difference Result 1160 states and 1311 transitions. [2022-07-19 10:06:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:06:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-19 10:06:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:06:31,650 INFO L225 Difference]: With dead ends: 1160 [2022-07-19 10:06:31,650 INFO L226 Difference]: Without dead ends: 849 [2022-07-19 10:06:31,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:06:31,653 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:06:31,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 61 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:06:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-07-19 10:06:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 581. [2022-07-19 10:06:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.1293103448275863) internal successors, (655), 580 states have internal predecessors, (655), 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 10:06:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 655 transitions. [2022-07-19 10:06:31,718 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 655 transitions. Word has length 235 [2022-07-19 10:06:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:06:31,718 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 655 transitions. [2022-07-19 10:06:31,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:06:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 655 transitions. [2022-07-19 10:06:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-07-19 10:06:31,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:06:31,724 INFO L195 NwaCegarLoop]: trace histogram [176, 154, 8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:06:31,751 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 10:06:31,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 10:06:31,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:06:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:06:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -765694528, now seen corresponding path program 5 times [2022-07-19 10:06:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:06:31,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790914889] [2022-07-19 10:06:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:06:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:06:32,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:06:32,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692944120] [2022-07-19 10:06:32,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:06:32,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:06:32,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:06:32,084 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 10:06:32,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process