./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/cohencu-ll_unwindbound2.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 f50c7bc2857aa84cb02200a831151d15e1603828dabc8b6cfed5e5d60ae2ee71 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 00:18:03,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 00:18:03,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 00:18:03,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 00:18:03,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 00:18:03,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 00:18:03,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 00:18:03,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 00:18:03,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 00:18:03,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 00:18:03,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 00:18:03,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 00:18:03,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 00:18:03,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 00:18:03,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 00:18:03,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 00:18:03,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 00:18:03,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 00:18:03,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 00:18:03,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 00:18:03,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 00:18:03,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 00:18:03,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 00:18:03,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 00:18:03,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 00:18:03,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 00:18:03,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 00:18:03,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 00:18:03,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 00:18:03,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 00:18:03,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 00:18:03,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 00:18:03,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 00:18:03,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 00:18:03,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 00:18:03,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 00:18:03,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 00:18:03,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 00:18:03,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 00:18:03,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 00:18:03,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 00:18:03,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 00:18:03,763 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 00:18:03,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 00:18:03,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 00:18:03,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 00:18:03,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 00:18:03,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 00:18:03,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 00:18:03,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 00:18:03,766 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 00:18:03,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 00:18:03,767 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 00:18:03,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 00:18:03,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 00:18:03,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 00:18:03,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 00:18:03,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 00:18:03,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 00:18:03,768 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 00:18:03,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 00:18:03,768 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 00:18:03,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 00:18:03,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 00:18:03,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 00:18:03,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 00:18:03,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:18:03,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 00:18:03,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 00:18:03,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 00:18:03,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 00:18:03,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 00:18:03,770 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 00:18:03,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 00:18:03,770 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 00:18:03,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 00:18:03,770 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 00:18:03,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f50c7bc2857aa84cb02200a831151d15e1603828dabc8b6cfed5e5d60ae2ee71 [2023-02-14 00:18:03,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 00:18:03,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 00:18:03,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 00:18:03,976 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 00:18:03,976 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 00:18:03,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2023-02-14 00:18:04,890 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 00:18:05,088 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 00:18:05,089 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2023-02-14 00:18:05,093 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df8b6b99/59bc159e41014365a8d64bf88fd0701e/FLAG70b0920bb [2023-02-14 00:18:05,102 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df8b6b99/59bc159e41014365a8d64bf88fd0701e [2023-02-14 00:18:05,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 00:18:05,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 00:18:05,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 00:18:05,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 00:18:05,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 00:18:05,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12878967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05, skipping insertion in model container [2023-02-14 00:18:05,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 00:18:05,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 00:18:05,201 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/cohencu-ll_unwindbound2.c[588,601] [2023-02-14 00:18:05,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:18:05,220 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 00:18:05,227 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/cohencu-ll_unwindbound2.c[588,601] [2023-02-14 00:18:05,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:18:05,241 INFO L208 MainTranslator]: Completed translation [2023-02-14 00:18:05,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05 WrapperNode [2023-02-14 00:18:05,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 00:18:05,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 00:18:05,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 00:18:05,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 00:18:05,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,260 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-02-14 00:18:05,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 00:18:05,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 00:18:05,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 00:18:05,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 00:18:05,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,272 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 00:18:05,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 00:18:05,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 00:18:05,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 00:18:05,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (1/1) ... [2023-02-14 00:18:05,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:18:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:05,307 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 00:18:05,312 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 00:18:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 00:18:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 00:18:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 00:18:05,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 00:18:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 00:18:05,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 00:18:05,378 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 00:18:05,379 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 00:18:05,488 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 00:18:05,491 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 00:18:05,492 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 00:18:05,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:18:05 BoogieIcfgContainer [2023-02-14 00:18:05,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 00:18:05,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 00:18:05,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 00:18:05,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 00:18:05,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:18:05" (1/3) ... [2023-02-14 00:18:05,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120b96bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:18:05, skipping insertion in model container [2023-02-14 00:18:05,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:05" (2/3) ... [2023-02-14 00:18:05,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120b96bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:18:05, skipping insertion in model container [2023-02-14 00:18:05,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:18:05" (3/3) ... [2023-02-14 00:18:05,508 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound2.c [2023-02-14 00:18:05,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 00:18:05,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 00:18:05,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 00:18:05,560 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;@317730c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 00:18:05,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 00:18:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 00:18:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 00:18:05,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:05,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:05,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:05,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:05,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2023-02-14 00:18:05,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:05,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820173202] [2023-02-14 00:18:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:05,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:18:05,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:05,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820173202] [2023-02-14 00:18:05,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820173202] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:18:05,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:18:05,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 00:18:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024286261] [2023-02-14 00:18:05,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:18:05,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 00:18:05,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 00:18:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 00:18:05,729 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:18:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:05,750 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2023-02-14 00:18:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 00:18:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-14 00:18:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:05,759 INFO L225 Difference]: With dead ends: 50 [2023-02-14 00:18:05,760 INFO L226 Difference]: Without dead ends: 22 [2023-02-14 00:18:05,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 00:18:05,766 INFO L413 NwaCegarLoop]: 37 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, 37 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 00:18:05,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:18:05,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-14 00:18:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-14 00:18:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 00:18:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-02-14 00:18:05,799 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2023-02-14 00:18:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:05,799 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-02-14 00:18:05,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:18:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-02-14 00:18:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 00:18:05,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:05,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:05,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 00:18:05,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2023-02-14 00:18:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:05,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518103097] [2023-02-14 00:18:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:18:05,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:05,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518103097] [2023-02-14 00:18:05,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518103097] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:18:05,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:18:05,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:18:05,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719148881] [2023-02-14 00:18:05,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:18:05,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 00:18:05,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:05,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 00:18:05,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 00:18:05,901 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:18:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:05,915 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2023-02-14 00:18:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 00:18:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 00:18:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:05,917 INFO L225 Difference]: With dead ends: 36 [2023-02-14 00:18:05,917 INFO L226 Difference]: Without dead ends: 24 [2023-02-14 00:18:05,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 00:18:05,918 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:05,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:18:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-14 00:18:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-14 00:18:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 00:18:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2023-02-14 00:18:05,923 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2023-02-14 00:18:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:05,923 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2023-02-14 00:18:05,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:18:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2023-02-14 00:18:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 00:18:05,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:05,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:05,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 00:18:05,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2023-02-14 00:18:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006108780] [2023-02-14 00:18:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:18:06,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006108780] [2023-02-14 00:18:06,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006108780] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:18:06,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:18:06,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 00:18:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536162218] [2023-02-14 00:18:06,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:18:06,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 00:18:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 00:18:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 00:18:06,150 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:18:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:06,212 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-02-14 00:18:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:18:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 00:18:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:06,214 INFO L225 Difference]: With dead ends: 30 [2023-02-14 00:18:06,214 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 00:18:06,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 00:18:06,215 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:06,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:18:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 00:18:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 00:18:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 00:18:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-02-14 00:18:06,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2023-02-14 00:18:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:06,235 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-02-14 00:18:06,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:18:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-02-14 00:18:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 00:18:06,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:06,236 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:06,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 00:18:06,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2023-02-14 00:18:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:06,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054706049] [2023-02-14 00:18:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:06,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:06,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:06,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949661791] [2023-02-14 00:18:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:06,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:06,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:06,273 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 00:18:06,275 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 00:18:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:06,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 00:18:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:18:06,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:18:06,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054706049] [2023-02-14 00:18:06,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949661791] [2023-02-14 00:18:06,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949661791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:06,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:06,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:06,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612837265] [2023-02-14 00:18:06,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:06,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:06,582 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 00:18:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:06,859 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2023-02-14 00:18:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:06,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-02-14 00:18:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:06,861 INFO L225 Difference]: With dead ends: 54 [2023-02-14 00:18:06,861 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 00:18:06,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:06,862 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:06,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 71 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 00:18:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-02-14 00:18:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-14 00:18:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2023-02-14 00:18:06,880 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 13 [2023-02-14 00:18:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:06,880 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2023-02-14 00:18:06,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 00:18:06,881 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2023-02-14 00:18:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 00:18:06,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:06,881 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:06,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 00:18:07,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:07,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2023-02-14 00:18:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:07,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887243723] [2023-02-14 00:18:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:07,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511469863] [2023-02-14 00:18:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:07,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:07,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:07,123 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 00:18:07,125 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 00:18:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:07,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 00:18:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:18:07,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:18:07,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:07,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887243723] [2023-02-14 00:18:07,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:07,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511469863] [2023-02-14 00:18:07,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511469863] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:07,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:07,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:07,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150441149] [2023-02-14 00:18:07,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:07,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:07,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:07,352 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 00:18:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:07,607 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2023-02-14 00:18:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 00:18:07,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-14 00:18:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:07,609 INFO L225 Difference]: With dead ends: 60 [2023-02-14 00:18:07,609 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 00:18:07,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:07,610 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:07,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 00:18:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-02-14 00:18:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-14 00:18:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-02-14 00:18:07,626 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2023-02-14 00:18:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:07,626 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-02-14 00:18:07,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 00:18:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-02-14 00:18:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 00:18:07,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:07,627 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:07,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 00:18:07,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:07,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:07,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2023-02-14 00:18:07,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:07,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415639426] [2023-02-14 00:18:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:07,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:07,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:07,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489256817] [2023-02-14 00:18:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:07,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:07,849 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 00:18:07,898 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 00:18:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 00:18:07,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 00:18:08,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 00:18:08,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:08,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415639426] [2023-02-14 00:18:08,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:08,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489256817] [2023-02-14 00:18:08,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489256817] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:08,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:08,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:08,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974472202] [2023-02-14 00:18:08,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:08,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:08,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:08,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:08,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:08,497 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 00:18:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:10,256 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-02-14 00:18:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 00:18:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-02-14 00:18:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:10,257 INFO L225 Difference]: With dead ends: 74 [2023-02-14 00:18:10,257 INFO L226 Difference]: Without dead ends: 65 [2023-02-14 00:18:10,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:10,258 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:10,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 60 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 00:18:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-14 00:18:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-14 00:18:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 00:18:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2023-02-14 00:18:10,271 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 23 [2023-02-14 00:18:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:10,271 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2023-02-14 00:18:10,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 00:18:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2023-02-14 00:18:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 00:18:10,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:10,272 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:10,297 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 00:18:10,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:10,483 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2023-02-14 00:18:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126559153] [2023-02-14 00:18:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:10,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:10,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298340239] [2023-02-14 00:18:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:10,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:10,509 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 00:18:10,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 00:18:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:10,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 00:18:10,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 00:18:10,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 00:18:10,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126559153] [2023-02-14 00:18:10,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298340239] [2023-02-14 00:18:10,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298340239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:10,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:10,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-02-14 00:18:10,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315988568] [2023-02-14 00:18:10,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:10,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 00:18:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 00:18:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 00:18:10,693 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-02-14 00:18:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:10,740 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2023-02-14 00:18:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:18:10,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 41 [2023-02-14 00:18:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:10,743 INFO L225 Difference]: With dead ends: 84 [2023-02-14 00:18:10,743 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 00:18:10,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 00:18:10,750 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:10,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:18:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 00:18:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-14 00:18:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 38 states have internal predecessors, (38), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 00:18:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2023-02-14 00:18:10,769 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 41 [2023-02-14 00:18:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:10,769 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2023-02-14 00:18:10,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-02-14 00:18:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2023-02-14 00:18:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 00:18:10,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:10,770 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:10,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 00:18:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:10,974 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 1 times [2023-02-14 00:18:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843315656] [2023-02-14 00:18:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:10,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508832385] [2023-02-14 00:18:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:10,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:10,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:10,982 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 00:18:10,984 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 00:18:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 00:18:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 00:18:11,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 00:18:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:11,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843315656] [2023-02-14 00:18:11,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:11,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508832385] [2023-02-14 00:18:11,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508832385] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:11,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:11,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-14 00:18:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317512023] [2023-02-14 00:18:11,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:11,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 00:18:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 00:18:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:11,254 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-14 00:18:13,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:18:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:14,118 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2023-02-14 00:18:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 00:18:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-02-14 00:18:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:14,120 INFO L225 Difference]: With dead ends: 96 [2023-02-14 00:18:14,120 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 00:18:14,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-14 00:18:14,120 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:14,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2023-02-14 00:18:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 00:18:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2023-02-14 00:18:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 48 states have internal predecessors, (49), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-14 00:18:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2023-02-14 00:18:14,180 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 46 [2023-02-14 00:18:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:14,181 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2023-02-14 00:18:14,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-14 00:18:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2023-02-14 00:18:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 00:18:14,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:14,182 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:14,188 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 00:18:14,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:14,386 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:14,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1316290887, now seen corresponding path program 2 times [2023-02-14 00:18:14,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:14,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581253850] [2023-02-14 00:18:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:14,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:14,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:14,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256481194] [2023-02-14 00:18:14,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:18:14,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:14,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:14,401 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 00:18:14,404 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 00:18:14,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:18:14,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 00:18:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 00:18:14,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-14 00:18:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:14,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581253850] [2023-02-14 00:18:14,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:14,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256481194] [2023-02-14 00:18:14,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256481194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:14,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:14,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627562174] [2023-02-14 00:18:14,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:14,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:14,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:14,693 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-14 00:18:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:15,358 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2023-02-14 00:18:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 56 [2023-02-14 00:18:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:15,360 INFO L225 Difference]: With dead ends: 94 [2023-02-14 00:18:15,360 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 00:18:15,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:15,361 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:15,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 88 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 00:18:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 00:18:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-14 00:18:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 51 states have internal predecessors, (52), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-14 00:18:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2023-02-14 00:18:15,386 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 56 [2023-02-14 00:18:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:15,387 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2023-02-14 00:18:15,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-14 00:18:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2023-02-14 00:18:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 00:18:15,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:15,388 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:15,401 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 00:18:15,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:15,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2023-02-14 00:18:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:15,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443541487] [2023-02-14 00:18:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:15,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:15,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:15,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764347549] [2023-02-14 00:18:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:15,611 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 00:18:15,614 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 00:18:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:15,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 00:18:15,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-14 00:18:15,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:15,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:15,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443541487] [2023-02-14 00:18:15,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:15,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764347549] [2023-02-14 00:18:15,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764347549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:18:15,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:18:15,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-14 00:18:15,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339772993] [2023-02-14 00:18:15,971 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:15,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 00:18:15,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:15,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 00:18:15,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-14 00:18:15,972 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-14 00:18:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:16,232 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-02-14 00:18:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2023-02-14 00:18:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:16,233 INFO L225 Difference]: With dead ends: 95 [2023-02-14 00:18:16,233 INFO L226 Difference]: Without dead ends: 93 [2023-02-14 00:18:16,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-02-14 00:18:16,234 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:16,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-14 00:18:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-02-14 00:18:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.1) internal successors, (55), 54 states have internal predecessors, (55), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-14 00:18:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2023-02-14 00:18:16,261 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 67 [2023-02-14 00:18:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:16,262 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2023-02-14 00:18:16,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-14 00:18:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2023-02-14 00:18:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 00:18:16,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:16,263 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:16,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 00:18:16,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:16,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1946665570, now seen corresponding path program 2 times [2023-02-14 00:18:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344053593] [2023-02-14 00:18:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:16,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93758125] [2023-02-14 00:18:16,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:18:16,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:16,480 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 00:18:16,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 00:18:16,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:18:16,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-14 00:18:16,522 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 00:18:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 00:18:16,555 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-14 00:18:16,556 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-14 00:18:16,556 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-14 00:18:16,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 00:18:16,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 00:18:16,765 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:16,767 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-14 00:18:16,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 12:18:16 BoogieIcfgContainer [2023-02-14 00:18:16,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-14 00:18:16,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-14 00:18:16,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-14 00:18:16,795 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-14 00:18:16,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:18:05" (3/4) ... [2023-02-14 00:18:16,797 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-14 00:18:16,862 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-14 00:18:16,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-14 00:18:16,863 INFO L158 Benchmark]: Toolchain (without parser) took 11759.02ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 75.6MB in the beginning and 95.8MB in the end (delta: -20.1MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2023-02-14 00:18:16,863 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory was 79.6MB in the beginning and 79.5MB in the end (delta: 78.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 00:18:16,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 137.01ms. Allocated memory is still 109.1MB. Free memory was 75.4MB in the beginning and 64.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 00:18:16,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.63ms. Allocated memory is still 109.1MB. Free memory was 64.3MB in the beginning and 62.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 00:18:16,864 INFO L158 Benchmark]: Boogie Preprocessor took 12.60ms. Allocated memory is still 109.1MB. Free memory was 62.3MB in the beginning and 61.4MB in the end (delta: 909.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 00:18:16,864 INFO L158 Benchmark]: RCFGBuilder took 218.74ms. Allocated memory is still 109.1MB. Free memory was 61.2MB in the beginning and 50.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 00:18:16,864 INFO L158 Benchmark]: TraceAbstraction took 11300.48ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 49.6MB in the beginning and 98.9MB in the end (delta: -49.3MB). Peak memory consumption was 3.0MB. Max. memory is 16.1GB. [2023-02-14 00:18:16,864 INFO L158 Benchmark]: Witness Printer took 67.59ms. Allocated memory is still 159.4MB. Free memory was 98.9MB in the beginning and 95.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-14 00:18:16,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory was 79.6MB in the beginning and 79.5MB in the end (delta: 78.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 137.01ms. Allocated memory is still 109.1MB. Free memory was 75.4MB in the beginning and 64.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.63ms. Allocated memory is still 109.1MB. Free memory was 64.3MB in the beginning and 62.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.60ms. Allocated memory is still 109.1MB. Free memory was 62.3MB in the beginning and 61.4MB in the end (delta: 909.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 218.74ms. Allocated memory is still 109.1MB. Free memory was 61.2MB in the beginning and 50.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 11300.48ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 49.6MB in the beginning and 98.9MB in the end (delta: -49.3MB). Peak memory consumption was 3.0MB. Max. memory is 16.1GB. * Witness Printer took 67.59ms. Allocated memory is still 159.4MB. Free memory was 98.9MB in the beginning and 95.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [a=2, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=2, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=2, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=2, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=2, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=2, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=2, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [a=2, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=2, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=2, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=2, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=2, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=2, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=2, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [a=2, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [a=2, counter=3, n=2, x=8, y=19, z=18] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.2s, OverallIterations: 11, TraceHistogramMax: 12, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 213 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 130 mSDsluCounter, 731 SdHoareTripleChecker+Invalid, 5.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 452 mSDsCounter, 182 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1881 IncrementalHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 182 mSolverCounterUnsat, 279 mSDtfsCounter, 1881 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 515 GetRequests, 423 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=10, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 356 NumberOfCodeBlocks, 356 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 468 ConstructedInterpolants, 0 QuantifiedInterpolants, 1986 SizeOfPredicates, 19 NumberOfNonLiveVariables, 765 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 826/998 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-14 00:18:16,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE