./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.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/ps4-ll_valuebound100.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 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:25:38,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:25:38,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:25:38,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:25:38,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:25:38,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:25:38,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:25:38,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:25:38,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:25:38,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:25:38,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:25:38,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:25:38,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:25:38,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:25:38,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:25:38,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:25:38,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:25:38,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:25:38,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:25:38,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:25:38,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:25:38,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:25:38,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:25:38,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:25:38,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:25:38,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:25:38,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:25:38,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:25:38,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:25:38,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:25:38,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:25:38,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:25:38,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:25:38,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:25:38,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:25:38,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:25:38,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:25:38,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:25:38,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:25:38,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:25:38,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:25:38,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 02:25:38,404 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:25:38,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:25:38,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:25:38,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:25:38,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:25:38,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:25:38,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:25:38,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:25:38,407 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:25:38,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:25:38,408 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:25:38,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:25:38,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:25:38,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:25:38,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 02:25:38,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:25:38,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 02:25:38,409 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:25:38,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 02:25:38,410 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:25:38,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 02:25:38,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:25:38,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:25:38,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:25:38,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:25:38,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:25:38,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:25:38,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 02:25:38,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:25:38,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:25:38,412 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:25:38,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 02:25:38,412 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:25:38,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:25:38,412 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:25:38,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2023-02-17 02:25:38,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:25:38,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:25:38,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:25:38,649 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:25:38,650 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:25:38,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-02-17 02:25:39,832 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:25:40,034 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:25:40,034 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-02-17 02:25:40,041 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a9eab45/c7af3e05b9ec46dc82601ffd03f39057/FLAGf34e02cd9 [2023-02-17 02:25:40,058 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a9eab45/c7af3e05b9ec46dc82601ffd03f39057 [2023-02-17 02:25:40,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:25:40,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:25:40,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:25:40,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:25:40,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:25:40,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a92b144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40, skipping insertion in model container [2023-02-17 02:25:40,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:25:40,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:25:40,194 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/ps4-ll_valuebound100.c[458,471] [2023-02-17 02:25:40,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:25:40,211 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:25:40,219 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/ps4-ll_valuebound100.c[458,471] [2023-02-17 02:25:40,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:25:40,234 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:25:40,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40 WrapperNode [2023-02-17 02:25:40,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:25:40,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:25:40,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:25:40,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:25:40,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,257 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-02-17 02:25:40,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:25:40,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:25:40,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:25:40,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:25:40,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:25:40,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:25:40,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:25:40,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:25:40,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (1/1) ... [2023-02-17 02:25:40,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:25:40,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:25:40,306 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) [2023-02-17 02:25:40,324 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 [2023-02-17 02:25:40,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:25:40,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:25:40,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:25:40,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:25:40,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 02:25:40,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 02:25:40,389 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:25:40,390 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:25:40,529 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:25:40,541 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:25:40,541 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 02:25:40,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:25:40 BoogieIcfgContainer [2023-02-17 02:25:40,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:25:40,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:25:40,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:25:40,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:25:40,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:25:40" (1/3) ... [2023-02-17 02:25:40,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f24e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:25:40, skipping insertion in model container [2023-02-17 02:25:40,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:25:40" (2/3) ... [2023-02-17 02:25:40,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f24e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:25:40, skipping insertion in model container [2023-02-17 02:25:40,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:25:40" (3/3) ... [2023-02-17 02:25:40,551 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2023-02-17 02:25:40,566 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:25:40,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 02:25:40,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:25:40,628 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;@5862baf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:25:40,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 02:25:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:25:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 02:25:40,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:25:40,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:25:40,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:25:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:25:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2023-02-17 02:25:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:25:40,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677990385] [2023-02-17 02:25:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:25:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:25:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:25:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677990385] [2023-02-17 02:25:40,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 02:25:40,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137323242] [2023-02-17 02:25:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:40,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:25:40,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:25:40,769 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) [2023-02-17 02:25:40,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:25:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:25:40,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 02:25:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:25:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:25:40,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:25:40,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137323242] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:25:40,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:25:40,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:25:40,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258324329] [2023-02-17 02:25:40,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:25:40,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 02:25:40,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:25:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 02:25:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:25:40,870 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:25:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:25:40,903 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-02-17 02:25:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 02:25:40,905 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 02:25:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:25:40,911 INFO L225 Difference]: With dead ends: 35 [2023-02-17 02:25:40,911 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 02:25:40,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:25:40,931 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2023-02-17 02:25:40,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:25:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 02:25:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-17 02:25:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:25:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-17 02:25:40,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-02-17 02:25:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:25:40,985 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-17 02:25:40,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:25:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-17 02:25:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 02:25:40,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:25:40,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:25:41,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 02:25:41,187 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 [2023-02-17 02:25:41,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:25:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:25:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2023-02-17 02:25:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:25:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667180925] [2023-02-17 02:25:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:41,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:25:41,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:25:41,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585875155] [2023-02-17 02:25:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:41,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:25:41,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:25:41,225 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) [2023-02-17 02:25:41,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:25:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:25:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 02:25:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:25:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:25:41,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:25:41,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:25:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667180925] [2023-02-17 02:25:41,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:25:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585875155] [2023-02-17 02:25:41,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585875155] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:25:41,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:25:41,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:25:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815414015] [2023-02-17 02:25:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:25:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:25:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:25:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:25:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:25:41,353 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:25:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:25:41,396 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-17 02:25:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:25:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 02:25:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:25:41,399 INFO L225 Difference]: With dead ends: 26 [2023-02-17 02:25:41,399 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 02:25:41,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:25:41,401 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:25:41,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:25:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 02:25:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 02:25:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:25:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-17 02:25:41,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2023-02-17 02:25:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:25:41,409 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-17 02:25:41,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:25:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-17 02:25:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 02:25:41,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:25:41,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:25:41,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 02:25:41,612 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 [2023-02-17 02:25:41,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:25:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:25:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2023-02-17 02:25:41,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:25:41,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634707654] [2023-02-17 02:25:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:25:41,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:25:41,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563203783] [2023-02-17 02:25:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:41,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:25:41,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:25:41,627 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) [2023-02-17 02:25:41,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 02:25:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:25:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 02:25:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:25:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:25:41,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:25:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:25:42,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:25:42,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634707654] [2023-02-17 02:25:42,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:25:42,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563203783] [2023-02-17 02:25:42,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563203783] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:25:42,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:25:42,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-17 02:25:42,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212517776] [2023-02-17 02:25:42,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:25:42,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 02:25:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:25:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 02:25:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:25:42,061 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:25:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:25:42,144 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-17 02:25:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:25:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-17 02:25:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:25:42,148 INFO L225 Difference]: With dead ends: 33 [2023-02-17 02:25:42,148 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 02:25:42,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-17 02:25:42,153 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:25:42,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:25:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 02:25:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-02-17 02:25:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:25:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-02-17 02:25:42,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2023-02-17 02:25:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:25:42,169 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-02-17 02:25:42,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:25:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-02-17 02:25:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 02:25:42,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:25:42,170 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:25:42,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 02:25:42,375 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 [2023-02-17 02:25:42,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:25:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:25:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2023-02-17 02:25:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:25:42,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145275383] [2023-02-17 02:25:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:42,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:25:42,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:25:42,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39747907] [2023-02-17 02:25:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:25:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:25:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:25:42,409 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) [2023-02-17 02:25:42,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 02:25:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:25:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 02:25:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:25:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 02:25:46,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:25:58,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:25:58,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145275383] [2023-02-17 02:25:58,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:25:58,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39747907] [2023-02-17 02:25:58,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39747907] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:25:58,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:25:58,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-17 02:25:58,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967463843] [2023-02-17 02:25:58,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:25:58,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:25:58,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:25:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:25:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=187, Unknown=4, NotChecked=0, Total=240 [2023-02-17 02:25:58,873 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:26:00,879 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 [] [2023-02-17 02:26:02,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:05,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:07,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:09,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:26:09,338 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-02-17 02:26:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:26:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-17 02:26:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:26:09,339 INFO L225 Difference]: With dead ends: 31 [2023-02-17 02:26:09,339 INFO L226 Difference]: Without dead ends: 26 [2023-02-17 02:26:09,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=72, Invalid=266, Unknown=4, NotChecked=0, Total=342 [2023-02-17 02:26:09,340 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:26:09,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 5 Unknown, 0 Unchecked, 10.4s Time] [2023-02-17 02:26:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-17 02:26:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-17 02:26:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:26:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-02-17 02:26:09,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2023-02-17 02:26:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:26:09,349 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-02-17 02:26:09,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:26:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-02-17 02:26:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 02:26:09,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:26:09,350 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:26:09,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 02:26:09,555 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 [2023-02-17 02:26:09,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:26:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:26:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2023-02-17 02:26:09,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:26:09,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326477539] [2023-02-17 02:26:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:26:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:26:09,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:26:09,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3699976] [2023-02-17 02:26:09,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:26:09,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:26:09,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:26:09,585 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) [2023-02-17 02:26:09,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 02:26:09,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:26:09,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:26:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 02:26:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:26:11,682 WARN L859 $PredicateComparison]: unable to prove that (and (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0) (= (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|) 0) (= 0 (+ |c_ULTIMATE.start_main_~c~0#1| (- 1)))) is different from true [2023-02-17 02:26:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-02-17 02:26:11,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:26:14,162 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-17 02:26:14,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:26:14,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326477539] [2023-02-17 02:26:14,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:26:14,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3699976] [2023-02-17 02:26:14,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3699976] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:26:14,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:26:14,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-17 02:26:14,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122423967] [2023-02-17 02:26:14,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:26:14,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 02:26:14,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:26:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 02:26:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=149, Unknown=2, NotChecked=50, Total=240 [2023-02-17 02:26:14,167 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:26:16,180 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 [] [2023-02-17 02:26:18,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:20,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:26:20,283 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-02-17 02:26:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:26:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-02-17 02:26:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:26:20,285 INFO L225 Difference]: With dead ends: 34 [2023-02-17 02:26:20,285 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 02:26:20,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=58, Invalid=220, Unknown=2, NotChecked=62, Total=342 [2023-02-17 02:26:20,286 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:26:20,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 3 Unknown, 28 Unchecked, 6.1s Time] [2023-02-17 02:26:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 02:26:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-17 02:26:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 02:26:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-17 02:26:20,297 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2023-02-17 02:26:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:26:20,297 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-17 02:26:20,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:26:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-17 02:26:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 02:26:20,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:26:20,298 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:26:20,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 02:26:20,503 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 [2023-02-17 02:26:20,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:26:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:26:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2023-02-17 02:26:20,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:26:20,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362295776] [2023-02-17 02:26:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:26:20,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:26:20,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:26:20,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344655337] [2023-02-17 02:26:20,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:26:20,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:26:20,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:26:20,521 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) [2023-02-17 02:26:20,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 02:26:20,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 02:26:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:26:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 02:26:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:26:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 02:26:20,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:26:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 02:26:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:26:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362295776] [2023-02-17 02:26:20,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:26:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344655337] [2023-02-17 02:26:20,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344655337] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:26:20,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:26:20,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-02-17 02:26:20,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139653560] [2023-02-17 02:26:20,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:26:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 02:26:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:26:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 02:26:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-17 02:26:20,774 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:26:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:26:21,129 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-02-17 02:26:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 02:26:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-02-17 02:26:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:26:21,130 INFO L225 Difference]: With dead ends: 47 [2023-02-17 02:26:21,131 INFO L226 Difference]: Without dead ends: 41 [2023-02-17 02:26:21,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-02-17 02:26:21,132 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:26:21,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 114 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:26:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-17 02:26:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-17 02:26:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:26:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-17 02:26:21,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 36 [2023-02-17 02:26:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:26:21,156 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-17 02:26:21,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:26:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-17 02:26:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 02:26:21,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:26:21,164 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:26:21,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 02:26:21,370 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 [2023-02-17 02:26:21,370 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:26:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:26:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 4 times [2023-02-17 02:26:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:26:21,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457914229] [2023-02-17 02:26:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:26:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:26:21,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:26:21,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078581710] [2023-02-17 02:26:21,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 02:26:21,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:26:21,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:26:21,381 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) [2023-02-17 02:26:21,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 02:26:21,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 02:26:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:26:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 02:26:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:26:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 02:26:23,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:26:31,150 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_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|) (- .cse0)) 0))))) is different from true [2023-02-17 02:26:37,176 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_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|) (- .cse0)) 0))))) is different from true [2023-02-17 02:26:39,184 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-17 02:26:39,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:26:39,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457914229] [2023-02-17 02:26:39,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:26:39,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078581710] [2023-02-17 02:26:39,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078581710] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:26:39,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:26:39,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 02:26:39,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530645662] [2023-02-17 02:26:39,189 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:26:39,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 02:26:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:26:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 02:26:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=295, Unknown=5, NotChecked=108, Total=462 [2023-02-17 02:26:39,191 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:26:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:26:39,490 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-02-17 02:26:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 02:26:39,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2023-02-17 02:26:39,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:26:39,493 INFO L225 Difference]: With dead ends: 49 [2023-02-17 02:26:39,493 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 02:26:39,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=74, Invalid=395, Unknown=5, NotChecked=126, Total=600 [2023-02-17 02:26:39,494 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:26:39,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 186 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:26:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 02:26:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-17 02:26:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 02:26:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-17 02:26:39,512 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2023-02-17 02:26:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:26:39,512 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-17 02:26:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:26:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-17 02:26:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 02:26:39,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:26:39,519 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:26:39,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 02:26:39,725 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 [2023-02-17 02:26:39,726 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:26:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:26:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 5 times [2023-02-17 02:26:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:26:39,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21413244] [2023-02-17 02:26:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:26:39,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:26:39,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:26:39,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454609474] [2023-02-17 02:26:39,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 02:26:39,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:26:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:26:39,736 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) [2023-02-17 02:26:39,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 02:26:39,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-17 02:26:39,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:26:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 02:26:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:26:41,973 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~c~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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0) (= |c_ULTIMATE.start_main_~y~0#1| 0)) is different from true [2023-02-17 02:26:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 120 trivial. 8 not checked. [2023-02-17 02:26:42,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:26:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:26:42,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21413244] [2023-02-17 02:26:42,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:26:42,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454609474] [2023-02-17 02:26:42,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454609474] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:26:42,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:26:42,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-17 02:26:42,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685111962] [2023-02-17 02:26:42,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:26:42,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 02:26:42,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:26:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 02:26:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-02-17 02:26:42,284 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 02:26:44,288 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 [] [2023-02-17 02:26:46,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:48,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:26:50,604 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 [] [2023-02-17 02:26:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:26:50,607 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-02-17 02:26:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 02:26:50,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2023-02-17 02:26:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:26:50,609 INFO L225 Difference]: With dead ends: 52 [2023-02-17 02:26:50,609 INFO L226 Difference]: Without dead ends: 47 [2023-02-17 02:26:50,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2023-02-17 02:26:50,614 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-02-17 02:26:50,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 214 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 465 Invalid, 4 Unknown, 48 Unchecked, 8.3s Time] [2023-02-17 02:26:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-17 02:26:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-17 02:26:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 02:26:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-02-17 02:26:50,645 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2023-02-17 02:26:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:26:50,647 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-02-17 02:26:50,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 02:26:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-02-17 02:26:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-17 02:26:50,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:26:50,649 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:26:50,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 02:26:50,856 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 [2023-02-17 02:26:50,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:26:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:26:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 6 times [2023-02-17 02:26:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:26:50,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83652418] [2023-02-17 02:26:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:26:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:26:50,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:26:50,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865269965] [2023-02-17 02:26:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 02:26:50,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:26:50,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:26:50,867 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) [2023-02-17 02:26:50,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 02:26:50,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-17 02:26:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:26:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-17 02:26:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:26:53,053 WARN L859 $PredicateComparison]: unable to prove that (and (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0) (= (+ (- 1) (+ (- 1) (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|))) (+ 2 1)) (= |c_ULTIMATE.start_main_~c~0#1| (+ 5 1))) is different from true [2023-02-17 02:26:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 37 proven. 136 refuted. 0 times theorem prover too weak. 153 trivial. 9 not checked. [2023-02-17 02:26:53,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:26:53,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:26:53,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83652418] [2023-02-17 02:26:53,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:26:53,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865269965] [2023-02-17 02:26:53,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865269965] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:26:53,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:26:53,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-17 02:26:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826551713] [2023-02-17 02:26:53,226 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:26:53,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 02:26:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:26:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 02:26:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=365, Unknown=1, NotChecked=38, Total=462 [2023-02-17 02:26:53,227 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 02:26:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:26:53,575 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-02-17 02:26:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 02:26:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2023-02-17 02:26:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:26:53,576 INFO L225 Difference]: With dead ends: 55 [2023-02-17 02:26:53,576 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 02:26:53,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=77, Invalid=478, Unknown=1, NotChecked=44, Total=600 [2023-02-17 02:26:53,578 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 02:26:53,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 229 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2023-02-17 02:26:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 02:26:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-17 02:26:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 02:26:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-02-17 02:26:53,594 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2023-02-17 02:26:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:26:53,594 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-02-17 02:26:53,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 02:26:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-02-17 02:26:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-17 02:26:53,595 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:26:53,595 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:26:53,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 02:26:53,801 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 [2023-02-17 02:26:53,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:26:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:26:53,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 7 times [2023-02-17 02:26:53,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:26:53,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035535126] [2023-02-17 02:26:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:26:53,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:26:53,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:26:53,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820941649] [2023-02-17 02:26:53,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 02:26:53,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:26:53,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:26:53,812 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) [2023-02-17 02:26:53,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 02:26:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:26:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 02:26:53,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:26:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 51 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-17 02:26:55,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:27:03,718 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|)) 4) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-17 02:27:10,050 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|)) 4) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-17 02:27:12,059 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-17 02:27:12,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:27:12,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035535126] [2023-02-17 02:27:12,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:27:12,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820941649] [2023-02-17 02:27:12,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820941649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:27:12,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:27:12,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-17 02:27:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120805066] [2023-02-17 02:27:12,065 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:27:12,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 02:27:12,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:27:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 02:27:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=409, Unknown=5, NotChecked=126, Total=600 [2023-02-17 02:27:12,067 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 02:27:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:27:12,472 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-02-17 02:27:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 02:27:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2023-02-17 02:27:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:27:12,473 INFO L225 Difference]: With dead ends: 58 [2023-02-17 02:27:12,473 INFO L226 Difference]: Without dead ends: 53 [2023-02-17 02:27:12,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=80, Invalid=527, Unknown=5, NotChecked=144, Total=756 [2023-02-17 02:27:12,478 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 02:27:12,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 276 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 02:27:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-17 02:27:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-17 02:27:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 02:27:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-02-17 02:27:12,496 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2023-02-17 02:27:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:27:12,498 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-02-17 02:27:12,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 02:27:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-02-17 02:27:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 02:27:12,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:27:12,504 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:27:12,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-17 02:27:12,709 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 [2023-02-17 02:27:12,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:27:12,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:27:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 8 times [2023-02-17 02:27:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:27:12,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779338578] [2023-02-17 02:27:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:27:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:27:12,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:27:12,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447292553] [2023-02-17 02:27:12,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:27:12,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:27:12,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:27:12,725 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) [2023-02-17 02:27:12,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 02:27:12,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:27:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:27:12,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-17 02:27:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:27:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 107 proven. 211 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-02-17 02:27:13,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:27:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:27:13,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779338578] [2023-02-17 02:27:13,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:27:13,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447292553] [2023-02-17 02:27:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447292553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:27:13,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:27:13,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-17 02:27:13,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069719999] [2023-02-17 02:27:13,464 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:27:13,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 02:27:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:27:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 02:27:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-02-17 02:27:13,466 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 02:27:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:27:14,036 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2023-02-17 02:27:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 02:27:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 92 [2023-02-17 02:27:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:27:14,037 INFO L225 Difference]: With dead ends: 65 [2023-02-17 02:27:14,038 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 02:27:14,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-02-17 02:27:14,039 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:27:14,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 342 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 02:27:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 02:27:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-17 02:27:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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) [2023-02-17 02:27:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-02-17 02:27:14,068 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 92 [2023-02-17 02:27:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:27:14,068 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-02-17 02:27:14,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 02:27:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-02-17 02:27:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-17 02:27:14,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:27:14,070 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:27:14,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 02:27:14,279 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 [2023-02-17 02:27:14,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:27:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:27:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 9 times [2023-02-17 02:27:14,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:27:14,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158423317] [2023-02-17 02:27:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:27:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:27:14,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:27:14,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449760862] [2023-02-17 02:27:14,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:27:14,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:27:14,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:27:14,305 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) [2023-02-17 02:27:14,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 02:27:14,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-17 02:27:14,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:27:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-17 02:27:14,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:27:16,607 WARN L859 $PredicateComparison]: unable to prove that (and (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0) (= (+ (- 1) (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|)) (+ (+ (+ 1 1) 1) 1)) (= |c_ULTIMATE.start_main_~c~0#1| (+ 5 1))) is different from true [2023-02-17 02:27:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 43 proven. 241 refuted. 0 times theorem prover too weak. 276 trivial. 12 not checked. [2023-02-17 02:27:16,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:27:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:27:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158423317] [2023-02-17 02:27:16,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:27:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449760862] [2023-02-17 02:27:16,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449760862] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:27:16,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:27:16,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-17 02:27:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465926881] [2023-02-17 02:27:16,816 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:27:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 02:27:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:27:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 02:27:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=488, Unknown=1, NotChecked=44, Total=600 [2023-02-17 02:27:16,817 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 02:27:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:27:17,346 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-02-17 02:27:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 02:27:17,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 99 [2023-02-17 02:27:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:27:17,348 INFO L225 Difference]: With dead ends: 68 [2023-02-17 02:27:17,348 INFO L226 Difference]: Without dead ends: 63 [2023-02-17 02:27:17,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=86, Invalid=619, Unknown=1, NotChecked=50, Total=756 [2023-02-17 02:27:17,349 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:27:17,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 346 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 821 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2023-02-17 02:27:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-17 02:27:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-17 02:27:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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) [2023-02-17 02:27:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-02-17 02:27:17,368 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 99 [2023-02-17 02:27:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:27:17,368 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-02-17 02:27:17,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 02:27:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-02-17 02:27:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-17 02:27:17,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:27:17,374 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:27:17,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 02:27:17,580 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 [2023-02-17 02:27:17,581 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:27:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:27:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 10 times [2023-02-17 02:27:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:27:17,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921014205] [2023-02-17 02:27:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:27:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:27:17,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:27:17,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887921719] [2023-02-17 02:27:17,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 02:27:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:27:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:27:17,602 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) [2023-02-17 02:27:17,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 02:27:17,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 02:27:17,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:27:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-17 02:27:17,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:27:19,900 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ 10 1) 1))) (and (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0) (= |c_ULTIMATE.start_main_~y~0#1| (+ 12 1)) (< .cse0 |c_ULTIMATE.start_main_~k~0#1|) (<= |c_ULTIMATE.start_main_~c~0#1| (+ .cse0 1)))) is different from true [2023-02-17 02:27:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 261 refuted. 0 times theorem prover too weak. 325 trivial. 13 not checked. [2023-02-17 02:27:21,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:27:29,152 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_113| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36|) (- .cse0)) 0))))) is different from true [2023-02-17 02:27:35,168 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_113| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36|) (- .cse0)) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-17 02:27:37,175 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-17 02:27:37,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:27:37,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921014205] [2023-02-17 02:27:37,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:27:37,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887921719] [2023-02-17 02:27:37,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887921719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:27:37,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:27:37,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-17 02:27:37,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276070858] [2023-02-17 02:27:37,180 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:27:37,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 02:27:37,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:27:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 02:27:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=543, Unknown=5, NotChecked=196, Total=812 [2023-02-17 02:27:37,182 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 02:27:38,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:27:40,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:27:42,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:27:44,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:27:46,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:27:48,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:27:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:27:48,768 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-02-17 02:27:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 02:27:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 106 [2023-02-17 02:27:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:27:48,770 INFO L225 Difference]: With dead ends: 71 [2023-02-17 02:27:48,770 INFO L226 Difference]: Without dead ends: 66 [2023-02-17 02:27:48,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=81, Invalid=632, Unknown=5, NotChecked=212, Total=930 [2023-02-17 02:27:48,771 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:27:48,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 365 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 854 Invalid, 4 Unknown, 70 Unchecked, 11.5s Time] [2023-02-17 02:27:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-17 02:27:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-02-17 02:27:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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) [2023-02-17 02:27:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-02-17 02:27:48,788 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 106 [2023-02-17 02:27:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:27:48,789 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-02-17 02:27:48,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 02:27:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-02-17 02:27:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-17 02:27:48,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:27:48,790 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:27:48,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 02:27:48,990 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 [2023-02-17 02:27:48,990 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:27:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:27:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash -444443359, now seen corresponding path program 11 times [2023-02-17 02:27:48,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:27:48,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919763262] [2023-02-17 02:27:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:27:48,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:27:48,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:27:48,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138675863] [2023-02-17 02:27:48,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 02:27:48,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:27:48,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:27:48,999 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) [2023-02-17 02:27:49,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 02:27:49,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-02-17 02:27:49,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:27:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-17 02:27:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:27:51,726 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~c~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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0) (= |c_ULTIMATE.start_main_~y~0#1| 0)) is different from true [2023-02-17 02:27:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 29 proven. 344 refuted. 0 times theorem prover too weak. 378 trivial. 14 not checked. [2023-02-17 02:27:51,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:27:52,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:27:52,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919763262] [2023-02-17 02:27:52,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:27:52,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138675863] [2023-02-17 02:27:52,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138675863] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:27:52,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:27:52,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-17 02:27:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169537178] [2023-02-17 02:27:52,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:27:52,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 02:27:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:27:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 02:27:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-02-17 02:27:52,021 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-17 02:27:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:27:52,551 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-02-17 02:27:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 02:27:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 113 [2023-02-17 02:27:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:27:52,552 INFO L225 Difference]: With dead ends: 74 [2023-02-17 02:27:52,552 INFO L226 Difference]: Without dead ends: 69 [2023-02-17 02:27:52,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=92, Invalid=723, Unknown=1, NotChecked=54, Total=870 [2023-02-17 02:27:52,553 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:27:52,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 404 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 984 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2023-02-17 02:27:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-17 02:27:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-17 02:27:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 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) [2023-02-17 02:27:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2023-02-17 02:27:52,587 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 113 [2023-02-17 02:27:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:27:52,587 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2023-02-17 02:27:52,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-17 02:27:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2023-02-17 02:27:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-17 02:27:52,589 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:27:52,589 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:27:52,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 02:27:52,795 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 [2023-02-17 02:27:52,796 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:27:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:27:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash -16713960, now seen corresponding path program 12 times [2023-02-17 02:27:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:27:52,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232830582] [2023-02-17 02:27:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:27:52,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:27:52,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:27:52,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013963209] [2023-02-17 02:27:52,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 02:27:52,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:27:52,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:27:52,810 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) [2023-02-17 02:27:52,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 02:27:53,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-17 02:27:53,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:27:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-17 02:27:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:27:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 46 proven. 391 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-17 02:27:53,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:27:53,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:27:53,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232830582] [2023-02-17 02:27:53,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:27:53,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013963209] [2023-02-17 02:27:53,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013963209] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:27:53,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:27:53,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-17 02:27:53,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613547777] [2023-02-17 02:27:53,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:27:53,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 02:27:53,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:27:53,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 02:27:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 02:27:53,812 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-17 02:27:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:27:54,515 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2023-02-17 02:27:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 02:27:54,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 120 [2023-02-17 02:27:54,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:27:54,516 INFO L225 Difference]: With dead ends: 77 [2023-02-17 02:27:54,516 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 02:27:54,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 02:27:54,517 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 02:27:54,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 445 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 02:27:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 02:27:54,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-02-17 02:27:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2023-02-17 02:27:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-17 02:27:54,536 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 120 [2023-02-17 02:27:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:27:54,536 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-17 02:27:54,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-17 02:27:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-17 02:27:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-02-17 02:27:54,537 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:27:54,538 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:27:54,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 02:27:54,738 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 [2023-02-17 02:27:54,738 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:27:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:27:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1287814847, now seen corresponding path program 13 times [2023-02-17 02:27:54,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:27:54,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835687404] [2023-02-17 02:27:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:27:54,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:27:54,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:27:54,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275073404] [2023-02-17 02:27:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 02:27:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:27:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:27:54,747 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) [2023-02-17 02:27:54,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 02:27:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:27:54,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-17 02:27:54,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:27:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 81 proven. 409 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-17 02:27:55,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:28:03,548 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_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_74|) (- .cse0)) 0))))) is different from true [2023-02-17 02:28:09,563 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_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_74|) (- .cse0)) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-17 02:28:11,571 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (- (* .cse0 .cse0)) (* |c_ULTIMATE.start_main_~k~0#1| .cse0))) 0) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2023-02-17 02:28:13,620 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)))) (or (= (let ((.cse0 (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (not (= (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| |c_ULTIMATE.start_main_~y~0#1| 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|)) 4) 0)) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false