./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-multidimensional/copy-3-n-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 caaec4b6d97bde36a1fbc7dfb6c9c9f88e0ac7fb0d2e87f4054fca32d8e102e9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:36:11,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:36:11,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:36:11,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:36:11,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:36:11,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:36:11,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:36:11,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:36:11,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:36:11,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:36:11,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:36:11,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:36:11,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:36:11,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:36:11,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:36:11,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:36:11,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:36:11,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:36:11,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:36:11,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:36:11,289 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:36:11,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:36:11,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:36:11,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:36:11,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:36:11,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:36:11,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:36:11,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:36:11,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:36:11,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:36:11,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:36:11,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:36:11,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:36:11,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:36:11,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:36:11,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:36:11,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:36:11,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:36:11,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:36:11,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:36:11,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:36:11,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:36:11,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:36:11,335 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:36:11,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:36:11,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:36:11,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:36:11,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:36:11,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:36:11,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:36:11,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:36:11,338 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:36:11,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:36:11,339 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:36:11,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:36:11,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:36:11,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:36:11,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:36:11,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:36:11,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:36:11,340 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:36:11,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:36:11,341 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:36:11,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:36:11,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:36:11,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:36:11,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:36:11,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:36:11,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:36:11,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:36:11,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:36:11,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:36:11,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:36:11,343 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:36:11,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:36:11,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:36:11,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> caaec4b6d97bde36a1fbc7dfb6c9c9f88e0ac7fb0d2e87f4054fca32d8e102e9 [2022-07-20 21:36:11,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:36:11,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:36:11,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:36:11,567 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:36:11,567 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:36:11,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2022-07-20 21:36:11,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2522d1e6a/8cfb6f9307c048779f67d00c48821019/FLAG037e6c4f6 [2022-07-20 21:36:11,933 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:36:11,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2022-07-20 21:36:11,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2522d1e6a/8cfb6f9307c048779f67d00c48821019/FLAG037e6c4f6 [2022-07-20 21:36:12,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2522d1e6a/8cfb6f9307c048779f67d00c48821019 [2022-07-20 21:36:12,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:36:12,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:36:12,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:36:12,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:36:12,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:36:12,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6452a15a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12, skipping insertion in model container [2022-07-20 21:36:12,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:36:12,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:36:12,529 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/copy-3-n-u.c[322,335] [2022-07-20 21:36:12,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:36:12,548 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:36:12,555 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/copy-3-n-u.c[322,335] [2022-07-20 21:36:12,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:36:12,572 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:36:12,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12 WrapperNode [2022-07-20 21:36:12,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:36:12,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:36:12,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:36:12,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:36:12,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,598 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2022-07-20 21:36:12,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:36:12,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:36:12,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:36:12,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:36:12,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:36:12,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:36:12,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:36:12,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:36:12,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (1/1) ... [2022-07-20 21:36:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:36:12,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:12,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:36:12,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:36:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:36:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:36:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:36:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:36:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:36:12,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:36:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:36:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:36:12,714 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:36:12,716 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:36:12,821 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:36:12,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:36:12,825 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-20 21:36:12,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:12 BoogieIcfgContainer [2022-07-20 21:36:12,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:36:12,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:36:12,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:36:12,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:36:12,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:36:12" (1/3) ... [2022-07-20 21:36:12,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622b8bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:12, skipping insertion in model container [2022-07-20 21:36:12,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:12" (2/3) ... [2022-07-20 21:36:12,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622b8bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:12, skipping insertion in model container [2022-07-20 21:36:12,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:12" (3/3) ... [2022-07-20 21:36:12,843 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2022-07-20 21:36:12,852 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:36:12,853 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:36:12,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:36:12,910 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@25ccfb1b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71306621 [2022-07-20 21:36:12,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:36:12,917 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) [2022-07-20 21:36:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:36:12,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:12,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:36:12,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:12,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2022-07-20 21:36:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:12,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279324569] [2022-07-20 21:36:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:12,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:12,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118901281] [2022-07-20 21:36:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:12,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:12,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:13,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:36:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:36:13,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-20 21:36:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:36:13,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:36:13,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:13,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279324569] [2022-07-20 21:36:13,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:13,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118901281] [2022-07-20 21:36:13,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118901281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:36:13,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:36:13,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:36:13,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457099093] [2022-07-20 21:36:13,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:36:13,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:36:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:13,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:36:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:36:13,120 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) [2022-07-20 21:36:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:13,132 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2022-07-20 21:36:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:36:13,133 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 [2022-07-20 21:36:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:13,138 INFO L225 Difference]: With dead ends: 52 [2022-07-20 21:36:13,138 INFO L226 Difference]: Without dead ends: 23 [2022-07-20 21:36:13,141 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 [2022-07-20 21:36:13,143 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 [2022-07-20 21:36:13,144 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] [2022-07-20 21:36:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-20 21:36:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-20 21:36:13,163 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) [2022-07-20 21:36:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-07-20 21:36:13,164 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2022-07-20 21:36:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:13,165 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-07-20 21:36:13,165 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) [2022-07-20 21:36:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-07-20 21:36:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:36:13,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:13,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:36:13,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:36:13,370 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 [2022-07-20 21:36:13,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2022-07-20 21:36:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143338109] [2022-07-20 21:36:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:13,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:13,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697376157] [2022-07-20 21:36:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:13,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:13,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:13,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:36:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:36:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:36:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:36:13,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:36:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143338109] [2022-07-20 21:36:13,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697376157] [2022-07-20 21:36:13,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697376157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:36:13,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:36:13,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:36:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577669777] [2022-07-20 21:36:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:36:13,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:36:13,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:13,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:36:13,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:36:13,469 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) [2022-07-20 21:36:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:13,492 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-07-20 21:36:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:36:13,493 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 [2022-07-20 21:36:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:13,493 INFO L225 Difference]: With dead ends: 44 [2022-07-20 21:36:13,493 INFO L226 Difference]: Without dead ends: 28 [2022-07-20 21:36:13,494 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 [2022-07-20 21:36:13,495 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:13,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:36:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-20 21:36:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-20 21:36:13,498 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) [2022-07-20 21:36:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-20 21:36:13,499 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2022-07-20 21:36:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:13,499 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-20 21:36:13,500 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) [2022-07-20 21:36:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-20 21:36:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 21:36:13,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:13,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:36:13,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:36:13,711 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 [2022-07-20 21:36:13,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:13,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2022-07-20 21:36:13,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:13,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417025670] [2022-07-20 21:36:13,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:13,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:13,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:13,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444258565] [2022-07-20 21:36:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:13,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:13,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:36:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:36:13,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:36:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:36:13,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:36:13,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:13,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417025670] [2022-07-20 21:36:13,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:13,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444258565] [2022-07-20 21:36:13,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444258565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:36:13,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:36:13,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:36:13,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783271669] [2022-07-20 21:36:13,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:36:13,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:36:13,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:36:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:36:13,799 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) [2022-07-20 21:36:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:13,837 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2022-07-20 21:36:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:36:13,838 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 [2022-07-20 21:36:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:13,838 INFO L225 Difference]: With dead ends: 61 [2022-07-20 21:36:13,838 INFO L226 Difference]: Without dead ends: 40 [2022-07-20 21:36:13,839 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 [2022-07-20 21:36:13,846 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:13,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:36:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-20 21:36:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-07-20 21:36:13,863 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) [2022-07-20 21:36:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-07-20 21:36:13,864 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2022-07-20 21:36:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:13,865 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-07-20 21:36:13,866 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) [2022-07-20 21:36:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-07-20 21:36:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 21:36:13,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:13,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:36:13,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:36:14,071 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 [2022-07-20 21:36:14,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2022-07-20 21:36:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:14,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256016120] [2022-07-20 21:36:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:14,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:14,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:14,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926834664] [2022-07-20 21:36:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:14,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:36:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:36:14,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:36:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:36:14,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:36:14,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:14,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256016120] [2022-07-20 21:36:14,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926834664] [2022-07-20 21:36:14,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926834664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:36:14,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:36:14,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:36:14,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435474798] [2022-07-20 21:36:14,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:36:14,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:36:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:14,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:36:14,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:36:14,181 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) [2022-07-20 21:36:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:14,237 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2022-07-20 21:36:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:36:14,238 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 [2022-07-20 21:36:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:14,239 INFO L225 Difference]: With dead ends: 61 [2022-07-20 21:36:14,240 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 21:36:14,243 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 [2022-07-20 21:36:14,244 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:14,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 40 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:36:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 21:36:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-20 21:36:14,251 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) [2022-07-20 21:36:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-20 21:36:14,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-07-20 21:36:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:14,256 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-20 21:36:14,256 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) [2022-07-20 21:36:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-20 21:36:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 21:36:14,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:14,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:36:14,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:36:14,472 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 [2022-07-20 21:36:14,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:14,473 INFO L85 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2022-07-20 21:36:14,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:14,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546483812] [2022-07-20 21:36:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:14,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:14,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:14,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496250312] [2022-07-20 21:36:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:14,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:14,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:14,481 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:14,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:36:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:36:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:36:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:36:14,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:36:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:36:14,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546483812] [2022-07-20 21:36:14,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496250312] [2022-07-20 21:36:14,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496250312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:36:14,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:36:14,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 21:36:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858299028] [2022-07-20 21:36:14,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:36:14,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:36:14,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:36:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:36:14,578 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) [2022-07-20 21:36:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:14,685 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2022-07-20 21:36:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:36:14,685 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 [2022-07-20 21:36:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:14,686 INFO L225 Difference]: With dead ends: 81 [2022-07-20 21:36:14,686 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 21:36:14,687 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 [2022-07-20 21:36:14,687 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:14,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 69 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:36:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 21:36:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-07-20 21:36:14,698 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) [2022-07-20 21:36:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-07-20 21:36:14,699 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 18 [2022-07-20 21:36:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:14,699 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-07-20 21:36:14,700 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) [2022-07-20 21:36:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-07-20 21:36:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 21:36:14,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:14,702 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:36:14,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:36:14,917 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 [2022-07-20 21:36:14,917 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash 988124671, now seen corresponding path program 2 times [2022-07-20 21:36:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:14,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003666825] [2022-07-20 21:36:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:14,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:14,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586117416] [2022-07-20 21:36:14,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:36:14,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:14,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:14,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:14,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:36:14,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 21:36:14,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:36:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:36:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:36:14,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:36:14,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003666825] [2022-07-20 21:36:14,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586117416] [2022-07-20 21:36:14,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586117416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:36:14,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:36:14,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:36:14,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538235982] [2022-07-20 21:36:14,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:36:14,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:36:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:36:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:36:14,996 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) [2022-07-20 21:36:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:15,028 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-07-20 21:36:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:36:15,029 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 [2022-07-20 21:36:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:15,034 INFO L225 Difference]: With dead ends: 105 [2022-07-20 21:36:15,034 INFO L226 Difference]: Without dead ends: 84 [2022-07-20 21:36:15,035 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 [2022-07-20 21:36:15,036 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:15,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:36:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-20 21:36:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2022-07-20 21:36:15,051 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) [2022-07-20 21:36:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-07-20 21:36:15,054 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-07-20 21:36:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:15,054 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-07-20 21:36:15,055 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) [2022-07-20 21:36:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-07-20 21:36:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:36:15,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:15,059 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] [2022-07-20 21:36:15,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:36:15,266 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 [2022-07-20 21:36:15,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 1 times [2022-07-20 21:36:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:15,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025179370] [2022-07-20 21:36:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:15,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:15,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052127426] [2022-07-20 21:36:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:15,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:15,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:15,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:36:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:36:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 21:36:15,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:36:15,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:36:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:36:15,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025179370] [2022-07-20 21:36:15,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052127426] [2022-07-20 21:36:15,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052127426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:36:15,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:36:15,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 21:36:15,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456624074] [2022-07-20 21:36:15,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:36:15,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:36:15,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:15,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:36:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:36:15,464 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) [2022-07-20 21:36:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:15,638 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2022-07-20 21:36:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:36:15,639 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 [2022-07-20 21:36:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:15,639 INFO L225 Difference]: With dead ends: 138 [2022-07-20 21:36:15,639 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 21:36:15,640 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 [2022-07-20 21:36:15,640 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 149 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:15,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 65 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:36:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 21:36:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2022-07-20 21:36:15,649 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) [2022-07-20 21:36:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-07-20 21:36:15,649 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2022-07-20 21:36:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:15,649 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-07-20 21:36:15,649 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) [2022-07-20 21:36:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-07-20 21:36:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 21:36:15,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:15,650 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] [2022-07-20 21:36:15,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:36:15,866 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 [2022-07-20 21:36:15,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:15,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2141491421, now seen corresponding path program 2 times [2022-07-20 21:36:15,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:15,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905236714] [2022-07-20 21:36:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:15,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:15,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:15,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707056798] [2022-07-20 21:36:15,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:36:15,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:15,905 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:15,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:36:15,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:36:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:36:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 21:36:15,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 21:36:16,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:36:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 21:36:16,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:16,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905236714] [2022-07-20 21:36:16,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:16,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707056798] [2022-07-20 21:36:16,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707056798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:36:16,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:36:16,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 21:36:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637759783] [2022-07-20 21:36:16,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:36:16,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:36:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:16,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:36:16,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:36:16,260 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) [2022-07-20 21:36:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:16,646 INFO L93 Difference]: Finished difference Result 252 states and 313 transitions. [2022-07-20 21:36:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:36:16,647 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 [2022-07-20 21:36:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:16,647 INFO L225 Difference]: With dead ends: 252 [2022-07-20 21:36:16,647 INFO L226 Difference]: Without dead ends: 179 [2022-07-20 21:36:16,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:36:16,649 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 418 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:16,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 112 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:36:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-20 21:36:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 136. [2022-07-20 21:36:16,673 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) [2022-07-20 21:36:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2022-07-20 21:36:16,674 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 43 [2022-07-20 21:36:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:16,674 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2022-07-20 21:36:16,674 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) [2022-07-20 21:36:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2022-07-20 21:36:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 21:36:16,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:16,678 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] [2022-07-20 21:36:16,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:36:16,891 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 [2022-07-20 21:36:16,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash 587853597, now seen corresponding path program 3 times [2022-07-20 21:36:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952052330] [2022-07-20 21:36:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:16,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:16,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180040437] [2022-07-20 21:36:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:36:16,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:16,914 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:16,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:36:16,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 21:36:16,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:36:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:36:16,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:36:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-07-20 21:36:17,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:36:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-07-20 21:36:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:36:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952052330] [2022-07-20 21:36:17,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:36:17,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180040437] [2022-07-20 21:36:17,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180040437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:36:17,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:36:17,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 21:36:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002598867] [2022-07-20 21:36:17,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:36:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:36:17,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:36:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:36:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:36:17,164 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) [2022-07-20 21:36:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:36:17,299 INFO L93 Difference]: Finished difference Result 632 states and 774 transitions. [2022-07-20 21:36:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:36:17,299 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 [2022-07-20 21:36:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:36:17,301 INFO L225 Difference]: With dead ends: 632 [2022-07-20 21:36:17,301 INFO L226 Difference]: Without dead ends: 527 [2022-07-20 21:36:17,301 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 [2022-07-20 21:36:17,302 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 190 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:36:17,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 71 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:36:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-20 21:36:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 304. [2022-07-20 21:36:17,334 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) [2022-07-20 21:36:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 345 transitions. [2022-07-20 21:36:17,335 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 345 transitions. Word has length 67 [2022-07-20 21:36:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:36:17,335 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 345 transitions. [2022-07-20 21:36:17,336 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) [2022-07-20 21:36:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 345 transitions. [2022-07-20 21:36:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-20 21:36:17,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:36:17,338 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] [2022-07-20 21:36:17,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 21:36:17,555 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 [2022-07-20 21:36:17,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:36:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:36:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1854973743, now seen corresponding path program 4 times [2022-07-20 21:36:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:36:17,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714988914] [2022-07-20 21:36:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:36:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:36:17,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:36:17,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223983686] [2022-07-20 21:36:17,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:36:17,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:36:17,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:36:17,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:36:17,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process