./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/nla-digbench-scaling/ps6-ll_valuebound50.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 aa3033c827040052fc2b3f2ac84da9b892249c5596676af10298d2e88bf55166 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 04:14:14,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 04:14:14,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 04:14:14,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 04:14:14,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 04:14:14,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 04:14:14,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 04:14:14,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 04:14:14,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 04:14:14,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 04:14:14,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 04:14:14,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 04:14:14,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 04:14:14,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 04:14:14,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 04:14:14,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 04:14:14,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 04:14:14,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 04:14:14,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 04:14:14,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 04:14:14,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 04:14:14,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 04:14:14,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 04:14:14,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 04:14:14,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 04:14:14,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 04:14:14,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 04:14:14,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 04:14:14,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 04:14:14,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 04:14:14,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 04:14:14,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 04:14:14,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 04:14:14,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 04:14:14,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 04:14:14,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 04:14:14,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 04:14:14,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 04:14:14,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 04:14:14,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 04:14:14,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 04:14:14,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 04:14:14,372 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 04:14:14,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 04:14:14,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 04:14:14,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 04:14:14,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 04:14:14,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 04:14:14,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 04:14:14,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 04:14:14,375 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 04:14:14,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 04:14:14,375 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 04:14:14,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 04:14:14,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 04:14:14,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 04:14:14,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 04:14:14,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 04:14:14,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 04:14:14,376 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 04:14:14,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 04:14:14,377 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 04:14:14,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 04:14:14,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 04:14:14,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 04:14:14,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 04:14:14,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:14:14,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 04:14:14,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 04:14:14,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 04:14:14,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 04:14:14,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 04:14:14,379 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 04:14:14,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 04:14:14,379 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 04:14:14,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 04:14:14,379 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 04:14:14,380 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa3033c827040052fc2b3f2ac84da9b892249c5596676af10298d2e88bf55166 [2023-02-18 04:14:14,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 04:14:14,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 04:14:14,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 04:14:14,681 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 04:14:14,682 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 04:14:14,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2023-02-18 04:14:15,855 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 04:14:16,044 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 04:14:16,045 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2023-02-18 04:14:16,052 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c1704143/84db6feba8864c2b8bed1be4a2dcd325/FLAGaa4450eca [2023-02-18 04:14:16,070 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c1704143/84db6feba8864c2b8bed1be4a2dcd325 [2023-02-18 04:14:16,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 04:14:16,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 04:14:16,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 04:14:16,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 04:14:16,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 04:14:16,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3845c844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16, skipping insertion in model container [2023-02-18 04:14:16,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 04:14:16,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 04:14:16,208 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c[458,471] [2023-02-18 04:14:16,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:14:16,232 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 04:14:16,240 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c[458,471] [2023-02-18 04:14:16,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:14:16,255 INFO L208 MainTranslator]: Completed translation [2023-02-18 04:14:16,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16 WrapperNode [2023-02-18 04:14:16,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 04:14:16,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 04:14:16,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 04:14:16,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 04:14:16,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,279 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-02-18 04:14:16,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 04:14:16,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 04:14:16,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 04:14:16,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 04:14:16,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 04:14:16,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 04:14:16,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 04:14:16,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 04:14:16,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (1/1) ... [2023-02-18 04:14:16,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:14:16,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:16,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 04:14:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 04:14:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 04:14:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 04:14:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 04:14:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 04:14:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 04:14:16,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 04:14:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 04:14:16,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 04:14:16,407 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 04:14:16,409 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 04:14:16,496 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 04:14:16,501 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 04:14:16,501 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 04:14:16,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:14:16 BoogieIcfgContainer [2023-02-18 04:14:16,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 04:14:16,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 04:14:16,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 04:14:16,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 04:14:16,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:14:16" (1/3) ... [2023-02-18 04:14:16,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1451a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:14:16, skipping insertion in model container [2023-02-18 04:14:16,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:14:16" (2/3) ... [2023-02-18 04:14:16,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1451a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:14:16, skipping insertion in model container [2023-02-18 04:14:16,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:14:16" (3/3) ... [2023-02-18 04:14:16,510 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.c [2023-02-18 04:14:16,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 04:14:16,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 04:14:16,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 04:14:16,572 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6453b110, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 04:14:16,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 04:14:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 04:14:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 04:14:16,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:16,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:16,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:14:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:14:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2023-02-18 04:14:16,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:14:16,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362034593] [2023-02-18 04:14:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:16,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:14:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:14:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:14:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362034593] [2023-02-18 04:14:16,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 04:14:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069435638] [2023-02-18 04:14:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:16,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:16,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:14:16,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 04:14:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:14:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 04:14:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:14:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 04:14:16,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 04:14:16,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069435638] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:14:16,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:14:16,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 04:14:16,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394591127] [2023-02-18 04:14:16,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:14:16,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 04:14:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:14:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 04:14:16,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 04:14:16,938 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:14:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:14:16,960 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2023-02-18 04:14:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 04:14:16,962 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-18 04:14:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:14:16,978 INFO L225 Difference]: With dead ends: 45 [2023-02-18 04:14:16,978 INFO L226 Difference]: Without dead ends: 20 [2023-02-18 04:14:16,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 04:14:16,989 INFO L413 NwaCegarLoop]: 27 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, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 04:14:16,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:14:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-18 04:14:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-18 04:14:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 04:14:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-18 04:14:17,050 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2023-02-18 04:14:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:14:17,050 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-18 04:14:17,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:14:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-18 04:14:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 04:14:17,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:17,052 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:17,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 04:14:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 04:14:17,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:14:17,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:14:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2023-02-18 04:14:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:14:17,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094260079] [2023-02-18 04:14:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:14:17,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:14:17,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420079374] [2023-02-18 04:14:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:17,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:17,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:14:17,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 04:14:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:14:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 04:14:17,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:14:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 04:14:17,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 04:14:17,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:14:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094260079] [2023-02-18 04:14:17,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:14:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420079374] [2023-02-18 04:14:17,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420079374] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:14:17,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:14:17,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 04:14:17,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530774645] [2023-02-18 04:14:17,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:14:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 04:14:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:14:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 04:14:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 04:14:17,376 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 04:14:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:14:17,519 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-02-18 04:14:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 04:14:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-02-18 04:14:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:14:17,521 INFO L225 Difference]: With dead ends: 31 [2023-02-18 04:14:17,521 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 04:14:17,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 04:14:17,523 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:14:17,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:14:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 04:14:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-18 04:14:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 04:14:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-18 04:14:17,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2023-02-18 04:14:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:14:17,535 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-18 04:14:17,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 04:14:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-18 04:14:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 04:14:17,536 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:17,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:17,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 04:14:17,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 04:14:17,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:14:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:14:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2023-02-18 04:14:17,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:14:17,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546454052] [2023-02-18 04:14:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:14:17,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:14:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694309797] [2023-02-18 04:14:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:17,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:17,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:17,762 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:14:17,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 04:14:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:14:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 04:14:17,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:14:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 04:14:17,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:14:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 04:14:18,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:14:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546454052] [2023-02-18 04:14:18,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:14:18,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694309797] [2023-02-18 04:14:18,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694309797] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:14:18,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:14:18,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 04:14:18,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856002335] [2023-02-18 04:14:18,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:14:18,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 04:14:18,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:14:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 04:14:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 04:14:18,284 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 04:14:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:14:18,407 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-02-18 04:14:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 04:14:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-02-18 04:14:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:14:18,409 INFO L225 Difference]: With dead ends: 38 [2023-02-18 04:14:18,409 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 04:14:18,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 04:14:18,411 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:14:18,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 89 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:14:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 04:14:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-02-18 04:14:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 04:14:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-18 04:14:18,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-02-18 04:14:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:14:18,421 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-18 04:14:18,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 04:14:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-18 04:14:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 04:14:18,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:18,423 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:18,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 04:14:18,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:18,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:14:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:14:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2023-02-18 04:14:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:14:18,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794479199] [2023-02-18 04:14:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:14:18,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:14:18,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116507195] [2023-02-18 04:14:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:18,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:18,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:18,653 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:14:18,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 04:14:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:14:18,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 04:14:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:14:20,780 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main_~k~0#1|) (= |c_ULTIMATE.start_main_~y~0#1| (+ 0 1)) (<= |c_ULTIMATE.start_main_~k~0#1| 1) (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) is different from true [2023-02-18 04:14:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 04:14:20,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:14:22,850 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) is different from false [2023-02-18 04:14:26,901 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 11 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 5 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) is different from true [2023-02-18 04:14:32,939 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 11 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 5 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) is different from true [2023-02-18 04:14:34,948 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2023-02-18 04:14:36,994 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (= (* |ULTIMATE.start_main_~k~0#1| .cse0) (* .cse0 .cse0))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:14:37,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:14:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794479199] [2023-02-18 04:14:37,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:14:37,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116507195] [2023-02-18 04:14:37,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116507195] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:14:37,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:14:37,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 04:14:37,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113363789] [2023-02-18 04:14:37,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:14:37,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 04:14:37,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:14:37,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 04:14:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=93, Unknown=6, NotChecked=138, Total=272 [2023-02-18 04:14:37,007 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-18 04:14:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:14:37,139 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-02-18 04:14:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 04:14:37,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2023-02-18 04:14:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:14:37,141 INFO L225 Difference]: With dead ends: 38 [2023-02-18 04:14:37,141 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 04:14:37,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=53, Invalid=147, Unknown=6, NotChecked=174, Total=380 [2023-02-18 04:14:37,142 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:14:37,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2023-02-18 04:14:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 04:14:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-18 04:14:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 04:14:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-18 04:14:37,151 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2023-02-18 04:14:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:14:37,151 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-18 04:14:37,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-18 04:14:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-18 04:14:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 04:14:37,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:37,153 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:37,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 04:14:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:37,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:14:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:14:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2023-02-18 04:14:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:14:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255717036] [2023-02-18 04:14:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:37,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:14:37,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:14:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148165693] [2023-02-18 04:14:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:14:37,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:37,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:14:37,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 04:14:37,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:14:37,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:14:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 04:14:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:14:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-18 04:14:37,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:14:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 04:14:37,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:14:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255717036] [2023-02-18 04:14:37,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:14:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148165693] [2023-02-18 04:14:37,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148165693] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:14:37,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:14:37,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-02-18 04:14:37,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23965943] [2023-02-18 04:14:37,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:14:37,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 04:14:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:14:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 04:14:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-02-18 04:14:37,687 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-18 04:14:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:14:38,018 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-02-18 04:14:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 04:14:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 43 [2023-02-18 04:14:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:14:38,020 INFO L225 Difference]: With dead ends: 51 [2023-02-18 04:14:38,020 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 04:14:38,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2023-02-18 04:14:38,021 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 04:14:38,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 175 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 04:14:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 04:14:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-02-18 04:14:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 04:14:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-18 04:14:38,047 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 43 [2023-02-18 04:14:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:14:38,049 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-18 04:14:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-18 04:14:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-18 04:14:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 04:14:38,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:38,053 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:38,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 04:14:38,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:38,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:14:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:14:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 3 times [2023-02-18 04:14:38,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:14:38,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643195387] [2023-02-18 04:14:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:38,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:14:38,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:14:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941081368] [2023-02-18 04:14:38,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:14:38,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:38,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:14:38,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 04:14:38,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 04:14:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:14:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 04:14:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:14:40,538 WARN L859 $PredicateComparison]: unable to prove that (and (= (+ 1 1) (+ |c_ULTIMATE.start_main_~c~0#1| (- 1))) (= |c_ULTIMATE.start_main_~y~0#1| (+ 2 1)) (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) is different from true [2023-02-18 04:14:42,544 WARN L859 $PredicateComparison]: unable to prove that (and (= (+ 2 1) (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|)) (= |c_ULTIMATE.start_main_~c~0#1| (+ 3 1)) (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) is different from true [2023-02-18 04:14:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 19 not checked. [2023-02-18 04:14:42,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:14:46,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:14:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643195387] [2023-02-18 04:14:46,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:14:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941081368] [2023-02-18 04:14:46,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941081368] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:14:46,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:14:46,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 04:14:46,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339566784] [2023-02-18 04:14:46,773 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:14:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 04:14:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:14:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 04:14:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=200, Unknown=3, NotChecked=58, Total=306 [2023-02-18 04:14:46,775 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-18 04:14:48,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:14:51,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:14:53,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:14:55,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:14:57,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:14:59,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:14:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:14:59,233 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-02-18 04:14:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 04:14:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2023-02-18 04:14:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:14:59,238 INFO L225 Difference]: With dead ends: 50 [2023-02-18 04:14:59,239 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 04:14:59,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=64, Invalid=283, Unknown=3, NotChecked=70, Total=420 [2023-02-18 04:14:59,240 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-02-18 04:14:59,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 163 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 6 Unknown, 128 Unchecked, 12.4s Time] [2023-02-18 04:14:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 04:14:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 04:14:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 04:14:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-18 04:14:59,254 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2023-02-18 04:14:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:14:59,255 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-18 04:14:59,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-18 04:14:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-18 04:14:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 04:14:59,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:59,256 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:59,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 04:14:59,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:59,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:14:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:14:59,463 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 4 times [2023-02-18 04:14:59,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:14:59,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692908074] [2023-02-18 04:14:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:14:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:14:59,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:14:59,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824200537] [2023-02-18 04:14:59,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 04:14:59,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:14:59,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:14:59,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:14:59,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 04:14:59,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 04:14:59,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:14:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 04:14:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:14:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 04:14:59,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:14:59,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:14:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692908074] [2023-02-18 04:14:59,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:14:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824200537] [2023-02-18 04:14:59,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824200537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:14:59,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:14:59,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 04:14:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094183863] [2023-02-18 04:14:59,694 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:14:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 04:14:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:14:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 04:14:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-02-18 04:14:59,696 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-18 04:14:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:14:59,907 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-02-18 04:14:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 04:14:59,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 71 [2023-02-18 04:14:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:14:59,908 INFO L225 Difference]: With dead ends: 53 [2023-02-18 04:14:59,908 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 04:14:59,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-18 04:14:59,909 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 04:14:59,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 266 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 04:14:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 04:14:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-18 04:14:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 04:14:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-02-18 04:14:59,924 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2023-02-18 04:14:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:14:59,924 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-02-18 04:14:59,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-18 04:14:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-02-18 04:14:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-18 04:14:59,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:14:59,926 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:14:59,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 04:15:00,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:15:00,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:15:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:15:00,134 INFO L85 PathProgramCache]: Analyzing trace with hash 416422906, now seen corresponding path program 5 times [2023-02-18 04:15:00,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:15:00,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696572563] [2023-02-18 04:15:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:15:00,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:15:00,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:15:00,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124713732] [2023-02-18 04:15:00,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 04:15:00,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:15:00,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:15:00,146 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:15:00,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 04:15:00,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 04:15:00,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:15:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 04:15:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:15:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 20 proven. 106 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-18 04:15:00,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:15:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:15:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696572563] [2023-02-18 04:15:00,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:15:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124713732] [2023-02-18 04:15:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124713732] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:15:00,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:15:00,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 04:15:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400327073] [2023-02-18 04:15:00,752 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:15:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 04:15:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:15:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 04:15:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-18 04:15:00,754 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-02-18 04:15:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:15:01,058 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-02-18 04:15:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 04:15:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 78 [2023-02-18 04:15:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:15:01,060 INFO L225 Difference]: With dead ends: 56 [2023-02-18 04:15:01,060 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 04:15:01,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-02-18 04:15:01,061 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 04:15:01,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 267 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 04:15:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 04:15:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-18 04:15:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 04:15:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-02-18 04:15:01,076 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2023-02-18 04:15:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:15:01,076 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-02-18 04:15:01,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-02-18 04:15:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-02-18 04:15:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-18 04:15:01,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:15:01,078 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:15:01,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 04:15:01,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 04:15:01,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:15:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:15:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1706793321, now seen corresponding path program 6 times [2023-02-18 04:15:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:15:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152145840] [2023-02-18 04:15:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:15:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:15:01,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:15:01,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922140101] [2023-02-18 04:15:01,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 04:15:01,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:15:01,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:15:01,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:15:01,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 04:15:03,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-18 04:15:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:15:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 04:15:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:15:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 22 proven. 133 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-02-18 04:15:04,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:15:04,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:15:04,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152145840] [2023-02-18 04:15:04,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:15:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922140101] [2023-02-18 04:15:04,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922140101] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:15:04,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:15:04,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 04:15:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944205373] [2023-02-18 04:15:04,224 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:15:04,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 04:15:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:15:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 04:15:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-02-18 04:15:04,233 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-02-18 04:15:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:15:04,578 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2023-02-18 04:15:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 04:15:04,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 85 [2023-02-18 04:15:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:15:04,580 INFO L225 Difference]: With dead ends: 59 [2023-02-18 04:15:04,581 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 04:15:04,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-02-18 04:15:04,582 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 04:15:04,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 301 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 04:15:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 04:15:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-18 04:15:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 04:15:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-02-18 04:15:04,598 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2023-02-18 04:15:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:15:04,598 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-02-18 04:15:04,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-02-18 04:15:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-02-18 04:15:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 04:15:04,600 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:15:04,600 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:15:04,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 04:15:04,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:15:04,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:15:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:15:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1063034534, now seen corresponding path program 7 times [2023-02-18 04:15:04,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:15:04,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315496066] [2023-02-18 04:15:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:15:04,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:15:04,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:15:04,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518891304] [2023-02-18 04:15:04,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 04:15:04,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:15:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:15:04,820 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:15:04,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 04:15:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:15:08,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 04:15:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:15:10,323 WARN L859 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~k~0#1| 9) (< 8 |c_ULTIMATE.start_main_~k~0#1|) (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12)) (= (+ (+ (+ 5 1) 1) 1) (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|))) is different from true [2023-02-18 04:15:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 51 proven. 136 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-02-18 04:15:10,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:15:12,380 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) is different from false [2023-02-18 04:15:16,400 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 5) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 6)) 12) 0)))) is different from true [2023-02-18 04:15:22,420 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 5) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 6)) 12) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:15:24,470 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (= (* |ULTIMATE.start_main_~k~0#1| .cse0) (* .cse0 .cse0))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:15:24,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:15:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315496066] [2023-02-18 04:15:24,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:15:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518891304] [2023-02-18 04:15:24,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518891304] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:15:24,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:15:24,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 04:15:24,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453925417] [2023-02-18 04:15:24,480 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:15:24,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 04:15:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:15:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 04:15:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=340, Unknown=5, NotChecked=200, Total=600 [2023-02-18 04:15:24,483 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-18 04:15:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:15:24,867 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-02-18 04:15:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 04:15:24,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 92 [2023-02-18 04:15:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:15:24,868 INFO L225 Difference]: With dead ends: 62 [2023-02-18 04:15:24,868 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 04:15:24,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=74, Invalid=447, Unknown=5, NotChecked=230, Total=756 [2023-02-18 04:15:24,870 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 04:15:24,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 316 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 574 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2023-02-18 04:15:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 04:15:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-18 04:15:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 04:15:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2023-02-18 04:15:24,895 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 92 [2023-02-18 04:15:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:15:24,895 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2023-02-18 04:15:24,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-18 04:15:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2023-02-18 04:15:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-18 04:15:24,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:15:24,897 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:15:24,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 04:15:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 04:15:25,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:15:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:15:25,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1524389175, now seen corresponding path program 8 times [2023-02-18 04:15:25,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:15:25,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071190290] [2023-02-18 04:15:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:15:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:15:25,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:15:25,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116761258] [2023-02-18 04:15:25,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:15:25,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:15:25,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:15:25,118 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:15:25,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 04:15:26,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:15:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:15:26,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 04:15:26,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:15:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 76 proven. 173 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-02-18 04:15:32,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:16:05,453 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (let ((.cse4 (* .cse5 .cse5))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (not (let ((.cse0 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (>= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 5) (div (+ .cse0 (* 119 .cse1) (* .cse2 65) (* .cse3 18)) 12) 1) (+ (div (+ .cse0 (- .cse1) (* 5 .cse2) (* .cse3 6)) 12) (* (* (* .cse4 .cse5) .cse5) .cse5))))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= (* |ULTIMATE.start_main_~k~0#1| .cse5) .cse4) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))))) is different from false [2023-02-18 04:16:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:16:05,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071190290] [2023-02-18 04:16:05,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:16:05,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116761258] [2023-02-18 04:16:05,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116761258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:16:05,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:16:05,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 04:16:05,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570500304] [2023-02-18 04:16:05,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:16:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 04:16:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:16:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 04:16:05,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=561, Unknown=11, NotChecked=48, Total=702 [2023-02-18 04:16:05,458 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-02-18 04:16:07,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:09,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:11,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:13,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:15,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:17,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:19,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:21,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:24,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:26,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:28,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:30,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:32,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:16:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:16:32,311 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-02-18 04:16:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 04:16:32,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 99 [2023-02-18 04:16:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:16:32,313 INFO L225 Difference]: With dead ends: 65 [2023-02-18 04:16:32,313 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 04:16:32,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=105, Invalid=700, Unknown=11, NotChecked=54, Total=870 [2023-02-18 04:16:32,314 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 1 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2023-02-18 04:16:32,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 416 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 772 Invalid, 13 Unknown, 0 Unchecked, 26.8s Time] [2023-02-18 04:16:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 04:16:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-18 04:16:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 04:16:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-02-18 04:16:32,333 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 99 [2023-02-18 04:16:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:16:32,333 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-02-18 04:16:32,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-02-18 04:16:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-02-18 04:16:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 04:16:32,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:16:32,335 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:16:32,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 04:16:32,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 04:16:32,541 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:16:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:16:32,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1130381638, now seen corresponding path program 9 times [2023-02-18 04:16:32,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:16:32,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081634194] [2023-02-18 04:16:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:16:32,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:16:32,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:16:32,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642461539] [2023-02-18 04:16:32,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:16:32,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:16:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:16:32,552 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:16:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 04:16:34,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-18 04:16:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:16:34,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 04:16:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:16:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 52 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-18 04:16:34,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:16:34,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:16:34,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081634194] [2023-02-18 04:16:34,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:16:34,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642461539] [2023-02-18 04:16:34,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642461539] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:16:34,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:16:34,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-18 04:16:34,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164371810] [2023-02-18 04:16:34,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:16:34,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 04:16:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:16:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 04:16:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-02-18 04:16:34,636 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 14 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-02-18 04:16:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:16:35,073 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2023-02-18 04:16:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 04:16:35,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 14 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 106 [2023-02-18 04:16:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:16:35,074 INFO L225 Difference]: With dead ends: 68 [2023-02-18 04:16:35,074 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 04:16:35,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-02-18 04:16:35,075 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 04:16:35,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 392 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 04:16:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 04:16:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-18 04:16:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 04:16:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2023-02-18 04:16:35,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 106 [2023-02-18 04:16:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:16:35,095 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2023-02-18 04:16:35,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 14 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-02-18 04:16:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2023-02-18 04:16:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-18 04:16:35,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:16:35,096 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:16:35,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 04:16:35,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 04:16:35,305 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:16:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:16:35,305 INFO L85 PathProgramCache]: Analyzing trace with hash -316789801, now seen corresponding path program 10 times [2023-02-18 04:16:35,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:16:35,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074275552] [2023-02-18 04:16:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:16:35,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:16:35,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:16:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913188906] [2023-02-18 04:16:35,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 04:16:35,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:16:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:16:35,323 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:16:35,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 04:16:35,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 04:16:35,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:16:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-18 04:16:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:16:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 28 proven. 234 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-02-18 04:16:35,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:16:35,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:16:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074275552] [2023-02-18 04:16:35,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:16:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913188906] [2023-02-18 04:16:35,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913188906] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:16:35,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:16:35,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 04:16:35,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918923640] [2023-02-18 04:16:35,625 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:16:35,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 04:16:35,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:16:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 04:16:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-02-18 04:16:35,626 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-02-18 04:16:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:16:36,092 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-02-18 04:16:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 04:16:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 113 [2023-02-18 04:16:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:16:36,093 INFO L225 Difference]: With dead ends: 71 [2023-02-18 04:16:36,093 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 04:16:36,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-02-18 04:16:36,094 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 04:16:36,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 04:16:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 04:16:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-18 04:16:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 04:16:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-02-18 04:16:36,115 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 113 [2023-02-18 04:16:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:16:36,115 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-02-18 04:16:36,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-02-18 04:16:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-02-18 04:16:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 04:16:36,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:16:36,116 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:16:36,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 04:16:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 04:16:36,322 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:16:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:16:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2004694042, now seen corresponding path program 11 times [2023-02-18 04:16:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:16:36,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572889673] [2023-02-18 04:16:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:16:36,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:16:36,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:16:36,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543794302] [2023-02-18 04:16:36,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 04:16:36,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:16:36,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:16:36,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:16:36,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 04:16:37,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-18 04:16:37,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:16:37,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 04:16:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:16:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 71 proven. 274 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-02-18 04:16:37,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:16:40,036 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) is different from false [2023-02-18 04:16:44,051 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| 2) (* 5 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| 11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| 6)) 12) 0)))) is different from true [2023-02-18 04:16:50,070 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| 2) (* 5 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| 11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_144| 6)) 12) 0)))) is different from true [2023-02-18 04:16:52,149 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (= (* |ULTIMATE.start_main_~k~0#1| .cse0) (* .cse0 .cse0))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:16:52,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:16:52,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572889673] [2023-02-18 04:16:52,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:16:52,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543794302] [2023-02-18 04:16:52,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543794302] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:16:52,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:16:52,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-18 04:16:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548213745] [2023-02-18 04:16:52,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:16:52,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 04:16:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:16:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 04:16:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=503, Unknown=4, NotChecked=188, Total=756 [2023-02-18 04:16:52,155 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-02-18 04:16:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:16:52,692 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2023-02-18 04:16:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 04:16:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 120 [2023-02-18 04:16:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:16:52,693 INFO L225 Difference]: With dead ends: 74 [2023-02-18 04:16:52,693 INFO L226 Difference]: Without dead ends: 68 [2023-02-18 04:16:52,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=80, Invalid=634, Unknown=4, NotChecked=212, Total=930 [2023-02-18 04:16:52,694 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 04:16:52,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 501 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 04:16:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-18 04:16:52,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-18 04:16:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 04:16:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-02-18 04:16:52,714 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 120 [2023-02-18 04:16:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:16:52,714 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-02-18 04:16:52,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-02-18 04:16:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-02-18 04:16:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-02-18 04:16:52,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:16:52,715 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:16:52,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 04:16:52,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:16:52,916 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:16:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:16:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1919686025, now seen corresponding path program 12 times [2023-02-18 04:16:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:16:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373399994] [2023-02-18 04:16:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:16:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:16:52,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:16:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675548620] [2023-02-18 04:16:52,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 04:16:52,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:16:52,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:16:52,926 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:16:52,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 04:17:43,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-18 04:17:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:17:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 04:17:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:17:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 58 proven. 334 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-02-18 04:17:43,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:17:43,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:17:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373399994] [2023-02-18 04:17:43,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:17:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675548620] [2023-02-18 04:17:43,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675548620] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:17:43,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:17:43,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 04:17:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415062269] [2023-02-18 04:17:43,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:17:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 04:17:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:17:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 04:17:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2023-02-18 04:17:43,507 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-02-18 04:17:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:17:44,134 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2023-02-18 04:17:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 04:17:44,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 127 [2023-02-18 04:17:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:17:44,136 INFO L225 Difference]: With dead ends: 77 [2023-02-18 04:17:44,136 INFO L226 Difference]: Without dead ends: 71 [2023-02-18 04:17:44,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-02-18 04:17:44,137 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 04:17:44,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 547 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 04:17:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-18 04:17:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-02-18 04:17:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 04:17:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2023-02-18 04:17:44,155 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 127 [2023-02-18 04:17:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:17:44,155 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2023-02-18 04:17:44,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-02-18 04:17:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2023-02-18 04:17:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 04:17:44,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:17:44,157 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:17:44,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 04:17:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 04:17:44,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:17:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:17:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1701953914, now seen corresponding path program 13 times [2023-02-18 04:17:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:17:44,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248594235] [2023-02-18 04:17:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:17:44,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:17:44,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:17:44,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166770753] [2023-02-18 04:17:44,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 04:17:44,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:17:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:17:44,379 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:17:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 04:17:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:17:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-18 04:17:52,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:17:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 81 proven. 361 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2023-02-18 04:17:52,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:17:54,294 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) is different from false [2023-02-18 04:17:58,316 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| 11) (* 5 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| 6)) 12) 0)))) is different from true [2023-02-18 04:18:04,341 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| 11) (* 5 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_183| 6)) 12) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:18:06,394 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (= (* |ULTIMATE.start_main_~k~0#1| .cse0) (* .cse0 .cse0))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:18:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:18:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248594235] [2023-02-18 04:18:06,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:18:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166770753] [2023-02-18 04:18:06,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166770753] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:18:06,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:18:06,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 04:18:06,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240324465] [2023-02-18 04:18:06,399 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:18:06,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 04:18:06,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:18:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 04:18:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=597, Unknown=4, NotChecked=204, Total=870 [2023-02-18 04:18:06,401 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 18 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-02-18 04:18:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:18:07,069 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2023-02-18 04:18:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 04:18:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 18 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 134 [2023-02-18 04:18:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:18:07,073 INFO L225 Difference]: With dead ends: 80 [2023-02-18 04:18:07,073 INFO L226 Difference]: Without dead ends: 74 [2023-02-18 04:18:07,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=84, Invalid=740, Unknown=4, NotChecked=228, Total=1056 [2023-02-18 04:18:07,074 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 04:18:07,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 568 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 04:18:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-18 04:18:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-02-18 04:18:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 04:18:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2023-02-18 04:18:07,095 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 134 [2023-02-18 04:18:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:18:07,095 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2023-02-18 04:18:07,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 18 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-02-18 04:18:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2023-02-18 04:18:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-18 04:18:07,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:18:07,096 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:18:07,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 04:18:07,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 04:18:07,297 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:18:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:18:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1085828841, now seen corresponding path program 14 times [2023-02-18 04:18:07,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:18:07,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546223323] [2023-02-18 04:18:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:18:07,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:18:07,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:18:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472006951] [2023-02-18 04:18:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:18:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:18:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:18:07,310 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:18:07,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 04:18:08,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:18:08,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:18:08,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 04:18:08,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:18:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 39 proven. 408 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2023-02-18 04:18:08,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:18:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 36 proven. 408 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-02-18 04:18:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:18:09,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546223323] [2023-02-18 04:18:09,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:18:09,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472006951] [2023-02-18 04:18:09,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472006951] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:18:09,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:18:09,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2023-02-18 04:18:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267564999] [2023-02-18 04:18:09,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:18:09,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 04:18:09,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:18:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 04:18:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 04:18:09,435 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 45 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 37 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 38 states have call predecessors, (39), 37 states have call successors, (39) [2023-02-18 04:18:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:18:13,285 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2023-02-18 04:18:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 04:18:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 37 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 38 states have call predecessors, (39), 37 states have call successors, (39) Word has length 141 [2023-02-18 04:18:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:18:13,287 INFO L225 Difference]: With dead ends: 135 [2023-02-18 04:18:13,287 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 04:18:13,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1425, Invalid=5217, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 04:18:13,289 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 194 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 04:18:13,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 849 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 04:18:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 04:18:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2023-02-18 04:18:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 38 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-18 04:18:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2023-02-18 04:18:13,346 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 141 [2023-02-18 04:18:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:18:13,347 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2023-02-18 04:18:13,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 37 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 38 states have call predecessors, (39), 37 states have call successors, (39) [2023-02-18 04:18:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2023-02-18 04:18:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-02-18 04:18:13,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:18:13,350 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 34, 34, 34, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:18:13,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-18 04:18:13,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 04:18:13,558 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:18:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:18:13,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1553468966, now seen corresponding path program 15 times [2023-02-18 04:18:13,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:18:13,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129709644] [2023-02-18 04:18:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:18:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:18:13,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:18:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858813540] [2023-02-18 04:18:13,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:18:13,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:18:13,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:18:13,575 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:18:13,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process