./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.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 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:00:02,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:00:02,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:00:02,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:00:02,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:00:02,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:00:02,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:00:02,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:00:02,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:00:02,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:00:02,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:00:02,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:00:02,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:00:02,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:00:02,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:00:02,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:00:02,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:00:02,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:00:02,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:00:02,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:00:02,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:00:02,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:00:02,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:00:02,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:00:02,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:00:02,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:00:02,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:00:02,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:00:02,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:00:02,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:00:02,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:00:02,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:00:02,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:00:02,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:00:02,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:00:02,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:00:02,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:00:02,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:00:02,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:00:02,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:00:02,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:00:02,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 13:00:02,526 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:00:02,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:00:02,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:00:02,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:00:02,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:00:02,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:00:02,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:00:02,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:00:02,528 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:00:02,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:00:02,529 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:00:02,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:00:02,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:00:02,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:00:02,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 13:00:02,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:00:02,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 13:00:02,530 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:00:02,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 13:00:02,530 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:00:02,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 13:00:02,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:00:02,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:00:02,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:00:02,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:00:02,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:00:02,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:00:02,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 13:00:02,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:00:02,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:00:02,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:00:02,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 13:00:02,532 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:00:02,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:00:02,533 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:00:02,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b [2023-02-14 13:00:02,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:00:02,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:00:02,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:00:02,786 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:00:02,786 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:00:02,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2023-02-14 13:00:03,721 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:00:03,849 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:00:03,849 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2023-02-14 13:00:03,854 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0267b14e/133a965217fd4fcdb7a365062dab1ab2/FLAG8a18ead87 [2023-02-14 13:00:03,863 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0267b14e/133a965217fd4fcdb7a365062dab1ab2 [2023-02-14 13:00:03,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:00:03,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:00:03,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:00:03,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:00:03,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:00:03,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:00:03" (1/1) ... [2023-02-14 13:00:03,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a77d6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:03, skipping insertion in model container [2023-02-14 13:00:03,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:00:03" (1/1) ... [2023-02-14 13:00:03,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:00:03,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:00:03,971 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2023-02-14 13:00:03,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:00:03,988 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:00:04,001 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2023-02-14 13:00:04,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:00:04,025 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:00:04,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04 WrapperNode [2023-02-14 13:00:04,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:00:04,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:00:04,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:00:04,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:00:04,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,051 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-02-14 13:00:04,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:00:04,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:00:04,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:00:04,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:00:04,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:00:04,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:00:04,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:00:04,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:00:04,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (1/1) ... [2023-02-14 13:00:04,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:00:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:04,124 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) [2023-02-14 13:00:04,137 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 [2023-02-14 13:00:04,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:00:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 13:00:04,171 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 13:00:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:00:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:00:04,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:00:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 13:00:04,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 13:00:04,209 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:00:04,210 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:00:04,296 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:00:04,299 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:00:04,299 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 13:00:04,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:00:04 BoogieIcfgContainer [2023-02-14 13:00:04,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:00:04,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:00:04,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:00:04,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:00:04,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:00:03" (1/3) ... [2023-02-14 13:00:04,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1530a3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:00:04, skipping insertion in model container [2023-02-14 13:00:04,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:04" (2/3) ... [2023-02-14 13:00:04,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1530a3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:00:04, skipping insertion in model container [2023-02-14 13:00:04,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:00:04" (3/3) ... [2023-02-14 13:00:04,306 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.c [2023-02-14 13:00:04,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:00:04,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 13:00:04,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:00:04,350 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;@4f383ae6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:00:04,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 13:00:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:00:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 13:00:04,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:04,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:04,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2023-02-14 13:00:04,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:04,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918082238] [2023-02-14 13:00:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:04,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:00:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918082238] [2023-02-14 13:00:04,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 13:00:04,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401463750] [2023-02-14 13:00:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:04,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:04,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:04,447 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) [2023-02-14 13:00:04,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:00:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 13:00:04,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:00:04,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:00:04,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401463750] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:00:04,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:00:04,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:00:04,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482900127] [2023-02-14 13:00:04,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:00:04,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 13:00:04,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:00:04,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 13:00:04,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 13:00:04,536 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:00:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:00:04,549 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2023-02-14 13:00:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 13:00:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 13:00:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:00:04,555 INFO L225 Difference]: With dead ends: 45 [2023-02-14 13:00:04,555 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 13:00:04,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 13:00:04,559 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:00:04,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:00:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 13:00:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-14 13:00:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:00:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-14 13:00:04,586 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2023-02-14 13:00:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:00:04,587 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-14 13:00:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:00:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-14 13:00:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 13:00:04,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:04,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:04,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 13:00:04,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 13:00:04,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2023-02-14 13:00:04,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:04,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529092511] [2023-02-14 13:00:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:04,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:00:04,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268208402] [2023-02-14 13:00:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:04,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:04,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:04,809 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) [2023-02-14 13:00:04,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:00:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:04,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 13:00:04,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 13:00:04,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:00:04,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:00:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529092511] [2023-02-14 13:00:04,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:00:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268208402] [2023-02-14 13:00:04,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268208402] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:00:04,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:00:04,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:00:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894229082] [2023-02-14 13:00:04,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:00:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:00:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:00:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:00:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:00:04,912 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:00:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:00:05,160 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-02-14 13:00:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:00:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-02-14 13:00:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:00:05,161 INFO L225 Difference]: With dead ends: 31 [2023-02-14 13:00:05,161 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 13:00:05,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:00:05,163 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:00:05,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:00:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 13:00:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-14 13:00:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:00:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-14 13:00:05,169 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2023-02-14 13:00:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:00:05,170 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-14 13:00:05,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:00:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-14 13:00:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 13:00:05,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:05,171 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:05,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 13:00:05,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 13:00:05,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2023-02-14 13:00:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:05,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500477648] [2023-02-14 13:00:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:05,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:00:05,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982650356] [2023-02-14 13:00:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:05,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:05,451 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) [2023-02-14 13:00:05,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:00:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 13:00:05,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:00:05,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:00:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 13:00:05,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:00:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500477648] [2023-02-14 13:00:05,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:00:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982650356] [2023-02-14 13:00:05,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982650356] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 13:00:05,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:00:05,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-02-14 13:00:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739723731] [2023-02-14 13:00:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:00:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:00:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:00:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:00:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:00:05,893 INFO L87 Difference]: Start difference. First operand 27 states and 30 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:00:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:00:05,926 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-14 13:00:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 13:00:05,927 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-14 13:00:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:00:05,928 INFO L225 Difference]: With dead ends: 33 [2023-02-14 13:00:05,928 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 13:00:05,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-14 13:00:05,929 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:00:05,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:00:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 13:00:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 13:00:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:00:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-14 13:00:05,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-02-14 13:00:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:00:05,938 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-14 13:00:05,938 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:00:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-14 13:00:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 13:00:05,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:05,939 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:05,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:00:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:06,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2023-02-14 13:00:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:06,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399467756] [2023-02-14 13:00:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:06,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:00:06,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724149299] [2023-02-14 13:00:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:06,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:06,186 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) [2023-02-14 13:00:06,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:00:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:06,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:00:06,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:00:06,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:00:10,456 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) .cse0) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-02-14 13:00:30,572 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-14 13:00:48,633 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-14 13:01:05,008 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2023-02-14 13:01:07,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:01:07,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399467756] [2023-02-14 13:01:07,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:01:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724149299] [2023-02-14 13:01:07,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724149299] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:01:07,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:01:07,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-14 13:01:07,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539502552] [2023-02-14 13:01:07,037 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:01:07,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 13:01:07,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:01:07,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 13:01:07,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=106, Unknown=5, NotChecked=92, Total=240 [2023-02-14 13:01:07,039 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:01:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:01:07,189 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-02-14 13:01:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:01:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2023-02-14 13:01:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:01:07,191 INFO L225 Difference]: With dead ends: 38 [2023-02-14 13:01:07,191 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 13:01:07,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=56, Invalid=165, Unknown=5, NotChecked=116, Total=342 [2023-02-14 13:01:07,192 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:01:07,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:01:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 13:01:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-14 13:01:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:01:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-14 13:01:07,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2023-02-14 13:01:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:01:07,199 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-14 13:01:07,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:01:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-14 13:01:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 13:01:07,200 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:01:07,200 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:01:07,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 13:01:07,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:07,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:01:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:01:07,402 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2023-02-14 13:01:07,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:01:07,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924672469] [2023-02-14 13:01:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:01:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:01:07,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:01:07,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742138969] [2023-02-14 13:01:07,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:01:07,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:07,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:01:07,414 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) [2023-02-14 13:01:07,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:01:07,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:01:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:01:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 13:01:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:01:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 13:01:07,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:01:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 13:01:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:01:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924672469] [2023-02-14 13:01:07,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:01:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742138969] [2023-02-14 13:01:07,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742138969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:01:07,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:01:07,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-02-14 13:01:07,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359177030] [2023-02-14 13:01:07,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:01:07,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 13:01:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:01:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 13:01:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-02-14 13:01:07,815 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-14 13:01:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:01:08,169 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-02-14 13:01:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 13:01:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 43 [2023-02-14 13:01:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:01:08,171 INFO L225 Difference]: With dead ends: 51 [2023-02-14 13:01:08,171 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 13:01:08,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2023-02-14 13:01:08,172 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:01:08,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:01:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 13:01:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-02-14 13:01:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 13:01:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-14 13:01:08,186 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 43 [2023-02-14 13:01:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:01:08,188 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-14 13:01:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-14 13:01:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-14 13:01:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 13:01:08,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:01:08,191 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:01:08,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 13:01:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:08,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:01:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:01:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 3 times [2023-02-14 13:01:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:01:08,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886041837] [2023-02-14 13:01:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:01:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:01:08,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:01:08,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222596654] [2023-02-14 13:01:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:01:08,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:08,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:01:08,421 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) [2023-02-14 13:01:08,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:01:08,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 13:01:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:01:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 13:01:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:01:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-14 13:01:08,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:01:08,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:01:08,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886041837] [2023-02-14 13:01:08,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:01:08,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222596654] [2023-02-14 13:01:08,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222596654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:01:08,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:01:08,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-14 13:01:08,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295371510] [2023-02-14 13:01:08,955 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:01:08,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 13:01:08,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:01:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 13:01:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-02-14 13:01:08,957 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-14 13:01:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:01:09,197 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-02-14 13:01:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:01:09,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2023-02-14 13:01:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:01:09,199 INFO L225 Difference]: With dead ends: 50 [2023-02-14 13:01:09,199 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 13:01:09,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-02-14 13:01:09,201 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:01:09,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:01:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 13:01:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-14 13:01:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 13:01:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-14 13:01:09,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2023-02-14 13:01:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:01:09,221 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-14 13:01:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-14 13:01:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-14 13:01:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 13:01:09,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:01:09,223 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:01:09,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 13:01:09,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:09,428 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:01:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:01:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 4 times [2023-02-14 13:01:09,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:01:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139546463] [2023-02-14 13:01:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:01:09,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:01:09,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:01:09,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833596525] [2023-02-14 13:01:09,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:01:09,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:01:09,438 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) [2023-02-14 13:01:09,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:01:09,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:01:09,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:01:09,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-14 13:01:09,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:01:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-02-14 13:01:09,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:01:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-14 13:01:10,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:01:10,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139546463] [2023-02-14 13:01:10,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:01:10,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833596525] [2023-02-14 13:01:10,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833596525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:01:10,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:01:10,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-14 13:01:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087368057] [2023-02-14 13:01:10,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:01:10,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 13:01:10,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:01:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 13:01:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:01:10,091 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-02-14 13:01:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:01:11,140 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2023-02-14 13:01:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 13:01:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 71 [2023-02-14 13:01:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:01:11,142 INFO L225 Difference]: With dead ends: 75 [2023-02-14 13:01:11,142 INFO L226 Difference]: Without dead ends: 67 [2023-02-14 13:01:11,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 13:01:11,144 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:01:11,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 355 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 13:01:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-14 13:01:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-02-14 13:01:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-14 13:01:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-02-14 13:01:11,167 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 71 [2023-02-14 13:01:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:01:11,168 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-02-14 13:01:11,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-02-14 13:01:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-02-14 13:01:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-14 13:01:11,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:01:11,170 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:01:11,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 13:01:11,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:11,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:01:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:01:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2004694042, now seen corresponding path program 5 times [2023-02-14 13:01:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:01:11,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143797856] [2023-02-14 13:01:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:01:11,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:01:11,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:01:11,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114486087] [2023-02-14 13:01:11,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:01:11,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:01:11,388 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) [2023-02-14 13:01:11,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process