./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i -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 918183af41ed822b080517d21adc4e88771d95d1ab967de55d618cd7a5912a2d --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:57:42,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:57:42,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:57:42,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:57:42,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:57:42,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:57:42,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:57:42,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:57:42,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:57:42,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:57:42,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:57:42,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:57:42,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:57:42,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:57:42,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:57:42,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:57:42,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:57:42,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:57:42,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:57:42,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:57:42,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:57:42,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:57:42,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:57:42,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:57:42,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:57:42,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:57:42,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:57:42,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:57:42,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:57:42,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:57:42,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:57:42,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:57:42,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:57:42,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:57:42,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:57:42,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:57:42,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:57:42,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:57:42,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:57:42,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:57:42,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:57:42,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:57:42,616 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:57:42,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:57:42,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:57:42,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:57:42,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:57:42,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:57:42,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:57:42,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:57:42,618 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:57:42,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:57:42,618 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:57:42,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:57:42,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:57:42,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:57:42,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:57:42,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:57:42,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:57:42,620 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:57:42,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:57:42,620 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:57:42,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:57:42,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:57:42,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:57:42,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:57:42,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:57:42,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:57:42,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:57:42,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:57:42,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:57:42,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:57:42,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:57:42,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:57:42,622 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:57:42,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:57:42,622 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:57:42,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 918183af41ed822b080517d21adc4e88771d95d1ab967de55d618cd7a5912a2d [2023-02-16 01:57:42,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:57:42,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:57:42,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:57:42,824 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:57:42,824 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:57:42,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i [2023-02-16 01:57:43,689 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:57:43,831 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:57:43,834 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i [2023-02-16 01:57:43,838 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82fd307e/fe72b0447de749b6b6a8c3fa4e1f07ed/FLAG578bb8d4e [2023-02-16 01:57:43,851 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82fd307e/fe72b0447de749b6b6a8c3fa4e1f07ed [2023-02-16 01:57:43,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:57:43,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:57:43,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:57:43,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:57:43,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:57:43,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:57:43" (1/1) ... [2023-02-16 01:57:43,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e466b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:43, skipping insertion in model container [2023-02-16 01:57:43,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:57:43" (1/1) ... [2023-02-16 01:57:43,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:57:43,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:57:43,974 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/divbin_valuebound100.i[950,963] [2023-02-16 01:57:43,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:57:43,989 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:57:43,997 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/divbin_valuebound100.i[950,963] [2023-02-16 01:57:44,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:57:44,012 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:57:44,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44 WrapperNode [2023-02-16 01:57:44,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:57:44,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:57:44,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:57:44,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:57:44,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,033 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-02-16 01:57:44,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:57:44,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:57:44,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:57:44,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:57:44,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,066 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:57:44,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:57:44,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:57:44,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:57:44,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (1/1) ... [2023-02-16 01:57:44,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:57:44,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:57:44,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 01:57:44,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 01:57:44,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:57:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-16 01:57:44,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-16 01:57:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:57:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:57:44,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:57:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 01:57:44,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 01:57:44,168 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:57:44,169 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:57:44,324 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:57:44,327 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:57:44,328 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 01:57:44,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:57:44 BoogieIcfgContainer [2023-02-16 01:57:44,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:57:44,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:57:44,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:57:44,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:57:44,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:57:43" (1/3) ... [2023-02-16 01:57:44,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4cd54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:57:44, skipping insertion in model container [2023-02-16 01:57:44,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:57:44" (2/3) ... [2023-02-16 01:57:44,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4cd54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:57:44, skipping insertion in model container [2023-02-16 01:57:44,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:57:44" (3/3) ... [2023-02-16 01:57:44,337 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound100.i [2023-02-16 01:57:44,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:57:44,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:57:44,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:57:44,392 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;@719d1aa0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:57:44,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:57:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 01:57:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 01:57:44,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:57:44,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:57:44,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:57:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:57:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2023-02-16 01:57:44,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:57:44,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571707466] [2023-02-16 01:57:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:44,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:57:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:57:44,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:57:44,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571707466] [2023-02-16 01:57:44,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 01:57:44,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906205725] [2023-02-16 01:57:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:44,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:57:44,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:57:44,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:57:44,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:57:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:57:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 01:57:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:57:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:57:44,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:57:44,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906205725] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:57:44,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:57:44,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:57:44,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662711002] [2023-02-16 01:57:44,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:57:44,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:57:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:57:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:57:44,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:57:44,653 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 01:57:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:57:44,668 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2023-02-16 01:57:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:57:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-02-16 01:57:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:57:44,674 INFO L225 Difference]: With dead ends: 55 [2023-02-16 01:57:44,674 INFO L226 Difference]: Without dead ends: 25 [2023-02-16 01:57:44,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:57:44,677 INFO L413 NwaCegarLoop]: 35 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, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:57:44,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:57:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-16 01:57:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-16 01:57:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 01:57:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-16 01:57:44,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2023-02-16 01:57:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:57:44,700 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-16 01:57:44,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 01:57:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-16 01:57:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 01:57:44,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:57:44,702 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:57:44,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 01:57:44,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-16 01:57:44,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:57:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:57:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2023-02-16 01:57:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:57:44,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537147510] [2023-02-16 01:57:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:57:44,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:57:44,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229709898] [2023-02-16 01:57:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:44,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:57:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:57:44,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:57:44,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:57:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:57:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:57:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:57:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 01:57:45,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:57:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 01:57:45,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:57:45,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537147510] [2023-02-16 01:57:45,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:57:45,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229709898] [2023-02-16 01:57:45,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229709898] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 01:57:45,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:57:45,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-02-16 01:57:45,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770736397] [2023-02-16 01:57:45,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:57:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 01:57:45,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:57:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 01:57:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:57:45,334 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 01:57:47,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:57:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:57:47,800 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-02-16 01:57:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:57:47,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-02-16 01:57:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:57:47,801 INFO L225 Difference]: With dead ends: 37 [2023-02-16 01:57:47,802 INFO L226 Difference]: Without dead ends: 34 [2023-02-16 01:57:47,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:57:47,803 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:57:47,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-02-16 01:57:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-16 01:57:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-16 01:57:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 01:57:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-02-16 01:57:47,810 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2023-02-16 01:57:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:57:47,811 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-02-16 01:57:47,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 01:57:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-02-16 01:57:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 01:57:47,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:57:47,814 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:57:47,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:57:48,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-16 01:57:48,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:57:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:57:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2023-02-16 01:57:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:57:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120184256] [2023-02-16 01:57:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:48,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:57:48,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:57:48,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220915592] [2023-02-16 01:57:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:57:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:57:48,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:57:48,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:57:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:57:48,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:57:48,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:57:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 01:57:48,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:57:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 01:57:48,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:57:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120184256] [2023-02-16 01:57:48,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:57:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220915592] [2023-02-16 01:57:48,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220915592] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 01:57:48,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:57:48,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-02-16 01:57:48,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738804886] [2023-02-16 01:57:48,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:57:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 01:57:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:57:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 01:57:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:57:48,363 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 01:57:50,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-16 01:57:52,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-16 01:57:55,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-16 01:57:57,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-16 01:57:59,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-16 01:57:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:57:59,265 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-02-16 01:57:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 01:57:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2023-02-16 01:57:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:57:59,267 INFO L225 Difference]: With dead ends: 48 [2023-02-16 01:57:59,267 INFO L226 Difference]: Without dead ends: 46 [2023-02-16 01:57:59,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:57:59,268 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-02-16 01:57:59,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 111 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 10.9s Time] [2023-02-16 01:57:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-16 01:57:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-02-16 01:57:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 01:57:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-16 01:57:59,275 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 33 [2023-02-16 01:57:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:57:59,276 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-16 01:57:59,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 01:57:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-16 01:57:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 01:57:59,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:57:59,277 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:57:59,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 01:57:59,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:57:59,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:57:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:57:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2023-02-16 01:57:59,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:57:59,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068194596] [2023-02-16 01:57:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:57:59,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:57:59,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876680344] [2023-02-16 01:57:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:59,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:57:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:57:59,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:57:59,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:57:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:57:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 01:57:59,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:57:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 01:57:59,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:57:59,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:57:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068194596] [2023-02-16 01:57:59,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:57:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876680344] [2023-02-16 01:57:59,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876680344] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:57:59,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:57:59,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:57:59,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427002968] [2023-02-16 01:57:59,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:57:59,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:57:59,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:57:59,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:57:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:57:59,558 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 01:57:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:57:59,576 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-02-16 01:57:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:57:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-02-16 01:57:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:57:59,578 INFO L225 Difference]: With dead ends: 51 [2023-02-16 01:57:59,578 INFO L226 Difference]: Without dead ends: 33 [2023-02-16 01:57:59,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:57:59,579 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:57:59,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:57:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-16 01:57:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-16 01:57:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 01:57:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-02-16 01:57:59,594 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 39 [2023-02-16 01:57:59,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:57:59,594 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-02-16 01:57:59,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 01:57:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-02-16 01:57:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 01:57:59,595 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:57:59,596 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:57:59,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-16 01:57:59,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:57:59,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:57:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:57:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1444020969, now seen corresponding path program 1 times [2023-02-16 01:57:59,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:57:59,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377040182] [2023-02-16 01:57:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:59,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:57:59,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:57:59,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677033665] [2023-02-16 01:57:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:57:59,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:57:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:57:59,827 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:57:59,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:57:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:57:59,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 01:57:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:57:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 01:57:59,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:58:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 01:58:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:58:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377040182] [2023-02-16 01:58:00,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:58:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677033665] [2023-02-16 01:58:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677033665] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:58:00,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:58:00,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-02-16 01:58:00,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913479493] [2023-02-16 01:58:00,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:58:00,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 01:58:00,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:58:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 01:58:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-16 01:58:00,026 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-16 01:58:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:58:00,433 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-16 01:58:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 01:58:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 39 [2023-02-16 01:58:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:58:00,434 INFO L225 Difference]: With dead ends: 39 [2023-02-16 01:58:00,434 INFO L226 Difference]: Without dead ends: 32 [2023-02-16 01:58:00,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:58:00,435 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:58:00,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:58:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-16 01:58:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-16 01:58:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 01:58:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-02-16 01:58:00,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2023-02-16 01:58:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:58:00,439 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-02-16 01:58:00,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-16 01:58:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-02-16 01:58:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 01:58:00,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:58:00,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:58:00,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 01:58:00,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:58:00,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:58:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:58:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2023-02-16 01:58:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:58:00,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563815614] [2023-02-16 01:58:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:58:00,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:58:00,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:58:00,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843701630] [2023-02-16 01:58:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:58:00,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:58:00,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:58:00,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:58:00,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:58:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:58:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-16 01:58:00,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:58:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 01:58:00,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:58:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:58:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563815614] [2023-02-16 01:58:07,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:58:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843701630] [2023-02-16 01:58:07,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843701630] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:58:07,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:58:07,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-16 01:58:07,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491184634] [2023-02-16 01:58:07,846 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 01:58:07,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 01:58:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:58:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 01:58:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=254, Unknown=3, NotChecked=0, Total=306 [2023-02-16 01:58:07,847 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-16 01:58:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:58:08,353 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-16 01:58:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 01:58:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2023-02-16 01:58:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:58:08,354 INFO L225 Difference]: With dead ends: 45 [2023-02-16 01:58:08,354 INFO L226 Difference]: Without dead ends: 43 [2023-02-16 01:58:08,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=102, Invalid=495, Unknown=3, NotChecked=0, Total=600 [2023-02-16 01:58:08,355 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:58:08,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 119 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:58:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-16 01:58:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-02-16 01:58:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 01:58:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-02-16 01:58:08,361 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 41 [2023-02-16 01:58:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:58:08,361 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-02-16 01:58:08,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-16 01:58:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-02-16 01:58:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-16 01:58:08,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:58:08,362 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:58:08,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 01:58:08,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:58:08,572 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:58:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:58:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2114474925, now seen corresponding path program 2 times [2023-02-16 01:58:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:58:08,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164558212] [2023-02-16 01:58:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:58:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:58:08,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:58:08,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978110556] [2023-02-16 01:58:08,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:58:08,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:58:08,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:58:08,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:58:08,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:58:08,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:58:08,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:58:08,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-16 01:58:08,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:58:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-16 01:58:46,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:58:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-16 01:58:46,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:58:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164558212] [2023-02-16 01:58:46,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:58:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978110556] [2023-02-16 01:58:46,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978110556] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:58:46,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:58:46,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2023-02-16 01:58:46,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690738488] [2023-02-16 01:58:46,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:58:46,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 01:58:46,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:58:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 01:58:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-02-16 01:58:46,937 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-02-16 01:58:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:58:49,306 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2023-02-16 01:58:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 01:58:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 49 [2023-02-16 01:58:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:58:49,308 INFO L225 Difference]: With dead ends: 76 [2023-02-16 01:58:49,308 INFO L226 Difference]: Without dead ends: 49 [2023-02-16 01:58:49,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-02-16 01:58:49,309 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-16 01:58:49,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 142 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-16 01:58:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-16 01:58:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2023-02-16 01:58:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 01:58:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-16 01:58:49,316 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 49 [2023-02-16 01:58:49,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:58:49,316 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-16 01:58:49,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-02-16 01:58:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-16 01:58:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 01:58:49,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:58:49,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:58:49,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 01:58:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:58:49,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:58:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:58:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1596822888, now seen corresponding path program 3 times [2023-02-16 01:58:49,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:58:49,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990371013] [2023-02-16 01:58:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:58:49,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:58:49,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:58:49,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694150704] [2023-02-16 01:58:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:58:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:58:49,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:58:49,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:58:49,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:58:56,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 01:58:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:58:56,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-16 01:58:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:00:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:00:13,392 INFO L328 TraceCheckSpWp]: Computing backward predicates...