./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/hard-ll_valuebound5.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 a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:20:27,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:20:27,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:20:27,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:20:27,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:20:27,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:20:27,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:20:27,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:20:27,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:20:27,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:20:27,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:20:27,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:20:27,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:20:27,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:20:27,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:20:27,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:20:27,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:20:27,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:20:27,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:20:27,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:20:27,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:20:27,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:20:27,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:20:27,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:20:27,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:20:27,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:20:27,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:20:27,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:20:27,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:20:27,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:20:27,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:20:27,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:20:27,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:20:27,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:20:27,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:20:27,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:20:27,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:20:27,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:20:27,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:20:27,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:20:27,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:20:27,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:20:27,662 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:20:27,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:20:27,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:20:27,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:20:27,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:20:27,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:20:27,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:20:27,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:20:27,663 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:20:27,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:20:27,664 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:20:27,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:20:27,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:20:27,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:20:27,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:20:27,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:20:27,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:20:27,665 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:20:27,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:20:27,665 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:20:27,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:20:27,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:20:27,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:20:27,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:20:27,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:20:27,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:20:27,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:20:27,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:20:27,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:20:27,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:20:27,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:20:27,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:20:27,667 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:20:27,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:20:27,668 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:20:27,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2023-02-16 02:20:27,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:20:27,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:20:27,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:20:27,939 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:20:27,940 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:20:27,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-02-16 02:20:29,012 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:20:29,169 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:20:29,170 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-02-16 02:20:29,175 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e6b7b1b/3ab1929e753441759f219432708c7225/FLAG74793e1e6 [2023-02-16 02:20:29,186 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e6b7b1b/3ab1929e753441759f219432708c7225 [2023-02-16 02:20:29,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:20:29,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:20:29,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:20:29,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:20:29,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:20:29,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61917a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29, skipping insertion in model container [2023-02-16 02:20:29,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:20:29,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:20:29,323 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/hard-ll_valuebound5.c[538,551] [2023-02-16 02:20:29,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:20:29,344 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:20:29,353 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/hard-ll_valuebound5.c[538,551] [2023-02-16 02:20:29,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:20:29,369 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:20:29,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29 WrapperNode [2023-02-16 02:20:29,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:20:29,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:20:29,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:20:29,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:20:29,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,396 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-02-16 02:20:29,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:20:29,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:20:29,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:20:29,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:20:29,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,427 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:20:29,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:20:29,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:20:29,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:20:29,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (1/1) ... [2023-02-16 02:20:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:20:29,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:29,489 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) [2023-02-16 02:20:29,497 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 [2023-02-16 02:20:29,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:20:29,524 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-16 02:20:29,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-16 02:20:29,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:20:29,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:20:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:20:29,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 02:20:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 02:20:29,571 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:20:29,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:20:29,683 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:20:29,688 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:20:29,688 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 02:20:29,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:20:29 BoogieIcfgContainer [2023-02-16 02:20:29,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:20:29,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:20:29,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:20:29,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:20:29,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:20:29" (1/3) ... [2023-02-16 02:20:29,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a0b61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:20:29, skipping insertion in model container [2023-02-16 02:20:29,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:20:29" (2/3) ... [2023-02-16 02:20:29,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a0b61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:20:29, skipping insertion in model container [2023-02-16 02:20:29,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:20:29" (3/3) ... [2023-02-16 02:20:29,703 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2023-02-16 02:20:29,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:20:29,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:20:29,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:20:29,771 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;@496c557e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:20:29,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:20:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 02:20:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 02:20:29,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:29,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:29,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2023-02-16 02:20:29,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:29,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847320664] [2023-02-16 02:20:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:29,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:29,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 02:20:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:29,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 02:20:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:29,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-16 02:20:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:20:29,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847320664] [2023-02-16 02:20:29,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847320664] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:20:29,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:20:29,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 02:20:30,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339972178] [2023-02-16 02:20:30,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:20:30,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 02:20:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:30,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 02:20:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:20:30,045 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 02:20:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:30,070 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2023-02-16 02:20:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 02:20:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-02-16 02:20:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:30,081 INFO L225 Difference]: With dead ends: 63 [2023-02-16 02:20:30,081 INFO L226 Difference]: Without dead ends: 29 [2023-02-16 02:20:30,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:20:30,089 INFO L413 NwaCegarLoop]: 43 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, 43 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 [2023-02-16 02:20:30,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:20:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-16 02:20:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-16 02:20:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-02-16 02:20:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-16 02:20:30,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-02-16 02:20:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:30,127 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-16 02:20:30,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 02:20:30,128 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-16 02:20:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 02:20:30,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:30,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:30,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 02:20:30,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2023-02-16 02:20:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:30,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826736972] [2023-02-16 02:20:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 02:20:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 02:20:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-16 02:20:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:20:30,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:30,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826736972] [2023-02-16 02:20:30,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826736972] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:20:30,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:20:30,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:20:30,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020039771] [2023-02-16 02:20:30,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:20:30,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:20:30,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:30,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:20:30,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:20:30,377 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 02:20:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:30,449 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-16 02:20:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:20:30,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-02-16 02:20:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:30,453 INFO L225 Difference]: With dead ends: 42 [2023-02-16 02:20:30,453 INFO L226 Difference]: Without dead ends: 40 [2023-02-16 02:20:30,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:20:30,455 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:30,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:20:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-16 02:20:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-16 02:20:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 02:20:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-16 02:20:30,478 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2023-02-16 02:20:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:30,478 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-16 02:20:30,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 02:20:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-16 02:20:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 02:20:30,479 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:30,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:30,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 02:20:30,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2023-02-16 02:20:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:30,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134866661] [2023-02-16 02:20:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 02:20:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-16 02:20:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-16 02:20:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 02:20:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:20:30,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:30,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134866661] [2023-02-16 02:20:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134866661] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:20:30,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:20:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:20:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508620043] [2023-02-16 02:20:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:20:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:20:30,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:30,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:20:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:20:30,693 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:20:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:30,771 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-02-16 02:20:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:20:30,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-16 02:20:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:30,773 INFO L225 Difference]: With dead ends: 46 [2023-02-16 02:20:30,774 INFO L226 Difference]: Without dead ends: 44 [2023-02-16 02:20:30,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:20:30,775 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:30,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:20:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-16 02:20:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-02-16 02:20:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 02:20:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-02-16 02:20:30,785 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2023-02-16 02:20:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:30,786 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-02-16 02:20:30,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:20:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-02-16 02:20:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 02:20:30,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:30,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:30,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 02:20:30,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2023-02-16 02:20:30,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:30,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217221294] [2023-02-16 02:20:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:30,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:30,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:20:30,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216816459] [2023-02-16 02:20:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:30,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:30,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:30,811 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) [2023-02-16 02:20:30,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:20:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 02:20:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:20:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:20:31,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:20:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:20:31,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:31,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217221294] [2023-02-16 02:20:31,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:20:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216816459] [2023-02-16 02:20:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216816459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:20:31,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:20:31,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 02:20:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102824698] [2023-02-16 02:20:31,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:20:31,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 02:20:31,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 02:20:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:20:31,230 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-16 02:20:33,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:20:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:33,432 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2023-02-16 02:20:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 02:20:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 34 [2023-02-16 02:20:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:33,434 INFO L225 Difference]: With dead ends: 72 [2023-02-16 02:20:33,435 INFO L226 Difference]: Without dead ends: 57 [2023-02-16 02:20:33,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:20:33,436 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:33,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 137 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-02-16 02:20:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-16 02:20:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-02-16 02:20:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 02:20:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-02-16 02:20:33,447 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 34 [2023-02-16 02:20:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:33,448 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-02-16 02:20:33,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-16 02:20:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-02-16 02:20:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 02:20:33,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:33,449 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:33,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 02:20:33,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:33,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2023-02-16 02:20:33,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:33,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061889964] [2023-02-16 02:20:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:33,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:33,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:20:33,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745200801] [2023-02-16 02:20:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:33,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:33,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:33,662 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) [2023-02-16 02:20:33,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:20:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:33,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 02:20:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:20:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:20:33,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:20:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:20:34,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:34,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061889964] [2023-02-16 02:20:34,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:20:34,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745200801] [2023-02-16 02:20:34,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745200801] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:20:34,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:20:34,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-16 02:20:34,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952374926] [2023-02-16 02:20:34,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:20:34,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 02:20:34,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:34,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 02:20:34,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-16 02:20:34,286 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-16 02:20:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:34,845 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2023-02-16 02:20:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 02:20:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2023-02-16 02:20:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:34,847 INFO L225 Difference]: With dead ends: 69 [2023-02-16 02:20:34,847 INFO L226 Difference]: Without dead ends: 62 [2023-02-16 02:20:34,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-16 02:20:34,848 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:34,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 100 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:20:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-16 02:20:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-16 02:20:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 02:20:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2023-02-16 02:20:34,862 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2023-02-16 02:20:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:34,862 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2023-02-16 02:20:34,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-16 02:20:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2023-02-16 02:20:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-16 02:20:34,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:34,864 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:34,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 02:20:35,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:35,070 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash -677073599, now seen corresponding path program 1 times [2023-02-16 02:20:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:35,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345285907] [2023-02-16 02:20:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:35,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:20:35,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531941312] [2023-02-16 02:20:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:35,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:35,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:35,085 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) [2023-02-16 02:20:35,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:20:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:35,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 02:20:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:20:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-16 02:20:35,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:20:35,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345285907] [2023-02-16 02:20:35,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:20:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531941312] [2023-02-16 02:20:35,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531941312] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:20:35,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:20:35,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 02:20:35,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584112219] [2023-02-16 02:20:35,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:20:35,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 02:20:35,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 02:20:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:20:35,173 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-16 02:20:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:35,238 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2023-02-16 02:20:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 02:20:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2023-02-16 02:20:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:35,239 INFO L225 Difference]: With dead ends: 70 [2023-02-16 02:20:35,240 INFO L226 Difference]: Without dead ends: 63 [2023-02-16 02:20:35,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:20:35,241 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:35,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 67 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:20:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-16 02:20:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-16 02:20:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 02:20:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-02-16 02:20:35,252 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 69 [2023-02-16 02:20:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:35,253 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-02-16 02:20:35,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-16 02:20:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-02-16 02:20:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-16 02:20:35,255 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:35,255 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:35,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 02:20:35,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:35,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2023-02-16 02:20:35,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:35,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698287880] [2023-02-16 02:20:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:35,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:20:35,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072657270] [2023-02-16 02:20:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:35,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:35,486 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) [2023-02-16 02:20:35,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 02:20:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 02:20:35,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:20:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-16 02:20:35,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:20:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-16 02:20:38,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698287880] [2023-02-16 02:20:38,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:20:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072657270] [2023-02-16 02:20:38,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072657270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:20:38,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:20:38,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-02-16 02:20:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464207052] [2023-02-16 02:20:38,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:20:38,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-16 02:20:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-16 02:20:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-02-16 02:20:38,891 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-16 02:20:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:45,112 INFO L93 Difference]: Finished difference Result 142 states and 181 transitions. [2023-02-16 02:20:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 02:20:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 71 [2023-02-16 02:20:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:45,115 INFO L225 Difference]: With dead ends: 142 [2023-02-16 02:20:45,115 INFO L226 Difference]: Without dead ends: 124 [2023-02-16 02:20:45,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-02-16 02:20:45,117 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 93 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:45,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 171 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-02-16 02:20:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-16 02:20:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2023-02-16 02:20:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 66 states have internal predecessors, (70), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-16 02:20:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-02-16 02:20:45,159 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 71 [2023-02-16 02:20:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:45,161 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-02-16 02:20:45,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-16 02:20:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2023-02-16 02:20:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-16 02:20:45,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:45,168 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:45,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 02:20:45,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:45,374 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:45,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2023-02-16 02:20:45,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:45,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81863322] [2023-02-16 02:20:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:45,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:45,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:20:45,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890160285] [2023-02-16 02:20:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:45,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:45,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:45,384 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) [2023-02-16 02:20:45,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 02:20:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:20:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-16 02:20:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:20:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-02-16 02:20:45,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:20:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-16 02:20:47,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81863322] [2023-02-16 02:20:47,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:20:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890160285] [2023-02-16 02:20:47,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890160285] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:20:47,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:20:47,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-16 02:20:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630618453] [2023-02-16 02:20:47,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:20:47,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 02:20:47,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 02:20:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-02-16 02:20:47,790 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2023-02-16 02:20:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:49,957 INFO L93 Difference]: Finished difference Result 145 states and 172 transitions. [2023-02-16 02:20:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:20:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 82 [2023-02-16 02:20:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:49,958 INFO L225 Difference]: With dead ends: 145 [2023-02-16 02:20:49,958 INFO L226 Difference]: Without dead ends: 106 [2023-02-16 02:20:49,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2023-02-16 02:20:49,960 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:49,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 186 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-16 02:20:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-16 02:20:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 76. [2023-02-16 02:20:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-16 02:20:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2023-02-16 02:20:49,980 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 82 [2023-02-16 02:20:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:49,980 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2023-02-16 02:20:49,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2023-02-16 02:20:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2023-02-16 02:20:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-16 02:20:49,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:49,982 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:49,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 02:20:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:50,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2023-02-16 02:20:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:50,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332668736] [2023-02-16 02:20:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:50,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:20:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565224342] [2023-02-16 02:20:50,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:20:50,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:50,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:50,202 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) [2023-02-16 02:20:50,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 02:20:50,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:20:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:20:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 02:20:50,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:20:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-16 02:20:50,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:20:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-16 02:20:50,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332668736] [2023-02-16 02:20:50,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:20:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565224342] [2023-02-16 02:20:50,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565224342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:20:50,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:20:50,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-02-16 02:20:50,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272891693] [2023-02-16 02:20:50,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:20:50,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:20:50,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:20:50,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:20:50,364 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-02-16 02:20:50,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:20:50,466 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2023-02-16 02:20:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 02:20:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2023-02-16 02:20:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:20:50,472 INFO L225 Difference]: With dead ends: 108 [2023-02-16 02:20:50,473 INFO L226 Difference]: Without dead ends: 81 [2023-02-16 02:20:50,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:20:50,475 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:20:50,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:20:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-16 02:20:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-16 02:20:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-16 02:20:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-02-16 02:20:50,510 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 84 [2023-02-16 02:20:50,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:20:50,511 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-02-16 02:20:50,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-02-16 02:20:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-02-16 02:20:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-16 02:20:50,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:20:50,516 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:20:50,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 02:20:50,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:50,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:20:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:20:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2023-02-16 02:20:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:20:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071528703] [2023-02-16 02:20:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:20:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:20:50,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:20:50,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845907740] [2023-02-16 02:20:50,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:20:50,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:20:50,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:20:50,739 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) [2023-02-16 02:20:50,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 02:20:50,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 02:20:50,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:20:50,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-16 02:20:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:20:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-02-16 02:20:51,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:21:07,732 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:21:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-02-16 02:21:47,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:21:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071528703] [2023-02-16 02:21:47,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:21:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845907740] [2023-02-16 02:21:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845907740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:21:47,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:21:47,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-16 02:21:47,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089393642] [2023-02-16 02:21:47,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:21:47,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 02:21:47,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:21:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 02:21:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-02-16 02:21:47,824 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-16 02:22:27,272 WARN L233 SmtUtils]: Spent 32.77s on a formula simplification. DAG size of input: 201 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:22:45,810 WARN L233 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 73 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:22:52,633 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 94 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:22:54,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:22:57,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:23:02,736 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 [] [2023-02-16 02:23:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:23:03,228 INFO L93 Difference]: Finished difference Result 187 states and 238 transitions. [2023-02-16 02:23:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 02:23:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 101 [2023-02-16 02:23:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:23:03,230 INFO L225 Difference]: With dead ends: 187 [2023-02-16 02:23:03,230 INFO L226 Difference]: Without dead ends: 164 [2023-02-16 02:23:03,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 69.4s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 02:23:03,231 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 112 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 146 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:23:03,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 295 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 864 Invalid, 2 Unknown, 0 Unchecked, 15.2s Time] [2023-02-16 02:23:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-16 02:23:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 133. [2023-02-16 02:23:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 86 states have internal predecessors, (94), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 02:23:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2023-02-16 02:23:03,279 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 101 [2023-02-16 02:23:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:23:03,280 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2023-02-16 02:23:03,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-16 02:23:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2023-02-16 02:23:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-16 02:23:03,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:23:03,281 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:23:03,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-16 02:23:03,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:23:03,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:23:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:23:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash 144924505, now seen corresponding path program 4 times [2023-02-16 02:23:03,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:23:03,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985468906] [2023-02-16 02:23:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:23:03,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:23:03,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:23:03,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864962665] [2023-02-16 02:23:03,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:23:03,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:23:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:23:03,512 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) [2023-02-16 02:23:03,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 02:23:03,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:23:03,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:23:03,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-16 02:23:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:23:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-02-16 02:23:04,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:23:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-02-16 02:23:27,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:23:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985468906] [2023-02-16 02:23:27,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:23:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864962665] [2023-02-16 02:23:27,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864962665] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:23:27,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:23:27,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 26 [2023-02-16 02:23:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133833293] [2023-02-16 02:23:27,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:23:27,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 02:23:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:23:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 02:23:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=533, Unknown=1, NotChecked=0, Total=650 [2023-02-16 02:23:27,895 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) [2023-02-16 02:24:21,044 WARN L233 SmtUtils]: Spent 51.31s on a formula simplification. DAG size of input: 165 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:24:22,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:23,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:26,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:27,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:29,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:42,565 WARN L233 SmtUtils]: Spent 10.55s on a formula simplification. DAG size of input: 94 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:24:45,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-16 02:24:47,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:54,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:56,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:24:58,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:25:00,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []