./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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_unwindbound20.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 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:36:09,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:36:09,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:36:09,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:36:09,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:36:09,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:36:09,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:36:09,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:36:09,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:36:09,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:36:09,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:36:09,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:36:09,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:36:09,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:36:09,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:36:09,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:36:09,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:36:09,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:36:09,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:36:09,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:36:09,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:36:09,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:36:09,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:36:09,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:36:09,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:36:09,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:36:09,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:36:09,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:36:09,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:36:09,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:36:09,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:36:09,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:36:09,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:36:09,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:36:09,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:36:09,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:36:09,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:36:09,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:36:09,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:36:09,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:36:09,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:36:09,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:36:09,967 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:36:09,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:36:09,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:36:09,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:36:09,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:36:09,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:36:09,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:36:09,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:36:09,969 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:36:09,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:36:09,970 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:36:09,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:36:09,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:36:09,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:36:09,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:36:09,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:36:09,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:36:09,971 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:36:09,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:36:09,971 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:36:09,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:36:09,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:36:09,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:36:09,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:36:09,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:36:09,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:36:09,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:36:09,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:36:09,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:36:09,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:36:09,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:36:09,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:36:09,973 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:36:09,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:36:09,974 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:36:09,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 [2023-02-15 11:36:10,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:36:10,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:36:10,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:36:10,141 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:36:10,142 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:36:10,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2023-02-15 11:36:11,147 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:36:11,286 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:36:11,286 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2023-02-15 11:36:11,290 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/004afc258/240a37778caa4b22ae0c252d67141953/FLAGafd75470c [2023-02-15 11:36:11,299 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/004afc258/240a37778caa4b22ae0c252d67141953 [2023-02-15 11:36:11,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:36:11,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:36:11,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:36:11,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:36:11,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:36:11,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc443b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11, skipping insertion in model container [2023-02-15 11:36:11,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:36:11,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:36:11,398 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_unwindbound20.i[950,963] [2023-02-15 11:36:11,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:36:11,414 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:36:11,436 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_unwindbound20.i[950,963] [2023-02-15 11:36:11,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:36:11,460 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:36:11,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11 WrapperNode [2023-02-15 11:36:11,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:36:11,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:36:11,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:36:11,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:36:11,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,484 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-02-15 11:36:11,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:36:11,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:36:11,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:36:11,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:36:11,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,503 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:36:11,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:36:11,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:36:11,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:36:11,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (1/1) ... [2023-02-15 11:36:11,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:36:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:11,525 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) [2023-02-15 11:36:11,538 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 [2023-02-15 11:36:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:36:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 11:36:11,560 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 11:36:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:36:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:36:11,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:36:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:36:11,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:36:11,604 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:36:11,605 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:36:11,705 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:36:11,709 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:36:11,709 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 11:36:11,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:36:11 BoogieIcfgContainer [2023-02-15 11:36:11,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:36:11,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:36:11,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:36:11,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:36:11,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:36:11" (1/3) ... [2023-02-15 11:36:11,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cf49a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:36:11, skipping insertion in model container [2023-02-15 11:36:11,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:36:11" (2/3) ... [2023-02-15 11:36:11,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cf49a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:36:11, skipping insertion in model container [2023-02-15 11:36:11,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:36:11" (3/3) ... [2023-02-15 11:36:11,715 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2023-02-15 11:36:11,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:36:11,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:36:11,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:36:11,757 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;@7aa49323, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:36:11,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:36:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 11:36:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 11:36:11,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:11,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:11,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2023-02-15 11:36:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:11,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58981878] [2023-02-15 11:36:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:11,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58981878] [2023-02-15 11:36:11,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 11:36:11,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998105704] [2023-02-15 11:36:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:11,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:11,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:11,895 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) [2023-02-15 11:36:11,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:36:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:36:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 11:36:11,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:36:11,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998105704] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:36:11,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:36:11,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:36:12,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209449017] [2023-02-15 11:36:12,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:36:12,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:36:12,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:36:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:36:12,040 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:36:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:12,071 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-02-15 11:36:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:36:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-15 11:36:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:12,081 INFO L225 Difference]: With dead ends: 53 [2023-02-15 11:36:12,082 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 11:36:12,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:36:12,100 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2023-02-15 11:36:12,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:36:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 11:36:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 11:36:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 11:36:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-02-15 11:36:12,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2023-02-15 11:36:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:12,144 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-02-15 11:36:12,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:36:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-02-15 11:36:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 11:36:12,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:12,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:12,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:36:12,351 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 [2023-02-15 11:36:12,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2023-02-15 11:36:12,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:12,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906740917] [2023-02-15 11:36:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:12,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:12,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268033570] [2023-02-15 11:36:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:12,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:12,380 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) [2023-02-15 11:36:12,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:36:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:12,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:36:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:12,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:36:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:12,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906740917] [2023-02-15 11:36:12,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:12,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268033570] [2023-02-15 11:36:12,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268033570] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:36:12,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:36:12,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:36:12,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419182203] [2023-02-15 11:36:12,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:36:12,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:36:12,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:36:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:36:12,549 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:36:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:12,565 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-02-15 11:36:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:36:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-02-15 11:36:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:12,566 INFO L225 Difference]: With dead ends: 38 [2023-02-15 11:36:12,566 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 11:36:12,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:36:12,567 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:12,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:36:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 11:36:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-15 11:36:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 11:36:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-15 11:36:12,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2023-02-15 11:36:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:12,572 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-15 11:36:12,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:36:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-15 11:36:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 11:36:12,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:12,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:12,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:36:12,777 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 [2023-02-15 11:36:12,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2023-02-15 11:36:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:12,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361880560] [2023-02-15 11:36:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:12,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:12,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384782915] [2023-02-15 11:36:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:12,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:12,807 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) [2023-02-15 11:36:12,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:36:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:12,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 11:36:12,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:13,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:36:13,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:13,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361880560] [2023-02-15 11:36:13,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:13,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384782915] [2023-02-15 11:36:13,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384782915] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:36:13,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:36:13,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 11:36:13,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868321738] [2023-02-15 11:36:13,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:36:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:36:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:36:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:36:13,007 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:36:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:13,145 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-02-15 11:36:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 11:36:13,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-15 11:36:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:13,147 INFO L225 Difference]: With dead ends: 38 [2023-02-15 11:36:13,147 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 11:36:13,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:36:13,150 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:13,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:36:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 11:36:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-15 11:36:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 11:36:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-02-15 11:36:13,167 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2023-02-15 11:36:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:13,167 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-02-15 11:36:13,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:36:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-02-15 11:36:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 11:36:13,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:13,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:13,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 11:36:13,373 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 [2023-02-15 11:36:13,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:13,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:13,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2023-02-15 11:36:13,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:13,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679939343] [2023-02-15 11:36:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:13,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:13,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605985624] [2023-02-15 11:36:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:13,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:13,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:13,395 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) [2023-02-15 11:36:13,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:36:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:13,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 11:36:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:36:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:13,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679939343] [2023-02-15 11:36:13,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:13,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605985624] [2023-02-15 11:36:13,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605985624] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:36:13,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:36:13,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 11:36:13,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689678578] [2023-02-15 11:36:13,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:36:13,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 11:36:13,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 11:36:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:36:13,507 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 11:36:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:13,553 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-02-15 11:36:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 11:36:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-02-15 11:36:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:13,558 INFO L225 Difference]: With dead ends: 69 [2023-02-15 11:36:13,559 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 11:36:13,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:36:13,563 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:13,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:36:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 11:36:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2023-02-15 11:36:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 11:36:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-02-15 11:36:13,580 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2023-02-15 11:36:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:13,581 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-02-15 11:36:13,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 11:36:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-02-15 11:36:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 11:36:13,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:13,582 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:13,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 11:36:13,786 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 [2023-02-15 11:36:13,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2023-02-15 11:36:13,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:13,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323377553] [2023-02-15 11:36:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:13,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:13,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674235402] [2023-02-15 11:36:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:13,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:13,797 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) [2023-02-15 11:36:13,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:36:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:13,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 11:36:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:36:13,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:36:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:14,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323377553] [2023-02-15 11:36:14,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674235402] [2023-02-15 11:36:14,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674235402] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:36:14,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:36:14,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-02-15 11:36:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501220218] [2023-02-15 11:36:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:36:14,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:36:14,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:36:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:36:14,114 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:36:16,131 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] [2023-02-15 11:36:18,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-15 11:36:20,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-15 11:36:22,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-15 11:36:24,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-15 11:36:26,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-15 11:36:28,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-15 11:36:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:28,992 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-02-15 11:36:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 11:36:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-15 11:36:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:28,993 INFO L225 Difference]: With dead ends: 59 [2023-02-15 11:36:28,993 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 11:36:28,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:36:28,994 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:28,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 109 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 14.9s Time] [2023-02-15 11:36:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 11:36:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2023-02-15 11:36:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:36:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-15 11:36:29,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2023-02-15 11:36:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:29,002 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-15 11:36:29,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:36:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-15 11:36:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 11:36:29,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:29,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:29,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 11:36:29,209 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 [2023-02-15 11:36:29,209 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:29,210 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2023-02-15 11:36:29,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:29,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141975314] [2023-02-15 11:36:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:29,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620520788] [2023-02-15 11:36:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:29,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:29,234 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) [2023-02-15 11:36:29,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 11:36:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 11:36:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:29,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:36:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:29,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141975314] [2023-02-15 11:36:29,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620520788] [2023-02-15 11:36:29,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620520788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:36:29,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:36:29,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 11:36:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879175830] [2023-02-15 11:36:29,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:36:29,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:36:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:36:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:36:29,382 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 11:36:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:29,450 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2023-02-15 11:36:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:36:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-02-15 11:36:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:29,452 INFO L225 Difference]: With dead ends: 124 [2023-02-15 11:36:29,452 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 11:36:29,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:36:29,453 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:29,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 146 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:36:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 11:36:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2023-02-15 11:36:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 92 states have internal predecessors, (107), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 11:36:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2023-02-15 11:36:29,470 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 25 [2023-02-15 11:36:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:29,470 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2023-02-15 11:36:29,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 11:36:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2023-02-15 11:36:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 11:36:29,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:29,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:29,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 11:36:29,675 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 [2023-02-15 11:36:29,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:29,676 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2023-02-15 11:36:29,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:29,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065215857] [2023-02-15 11:36:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:29,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:29,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:29,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128067349] [2023-02-15 11:36:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:29,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:29,686 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) [2023-02-15 11:36:29,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 11:36:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:36:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:36:29,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:36:29,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065215857] [2023-02-15 11:36:29,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128067349] [2023-02-15 11:36:29,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128067349] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:36:29,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:36:29,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:36:29,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248739674] [2023-02-15 11:36:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:36:29,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 11:36:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 11:36:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:36:29,756 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:36:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:29,777 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2023-02-15 11:36:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 11:36:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-15 11:36:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:29,778 INFO L225 Difference]: With dead ends: 151 [2023-02-15 11:36:29,778 INFO L226 Difference]: Without dead ends: 96 [2023-02-15 11:36:29,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:36:29,779 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:29,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:36:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-15 11:36:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-02-15 11:36:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 11:36:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2023-02-15 11:36:29,792 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2023-02-15 11:36:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:29,792 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2023-02-15 11:36:29,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:36:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2023-02-15 11:36:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 11:36:29,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:29,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:29,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 11:36:29,998 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 [2023-02-15 11:36:29,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2023-02-15 11:36:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016287076] [2023-02-15 11:36:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:30,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:30,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:30,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592686196] [2023-02-15 11:36:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:30,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:30,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:30,014 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) [2023-02-15 11:36:30,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 11:36:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 11:36:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 11:36:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:36:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 11:36:30,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016287076] [2023-02-15 11:36:30,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592686196] [2023-02-15 11:36:30,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592686196] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:36:30,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:36:30,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-02-15 11:36:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952013742] [2023-02-15 11:36:30,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:36:30,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 11:36:30,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 11:36:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:36:30,208 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 11:36:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:30,271 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2023-02-15 11:36:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 11:36:30,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2023-02-15 11:36:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:30,272 INFO L225 Difference]: With dead ends: 111 [2023-02-15 11:36:30,272 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 11:36:30,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:36:30,274 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:30,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:36:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 11:36:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-15 11:36:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 76 states have internal predecessors, (88), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 11:36:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2023-02-15 11:36:30,290 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 31 [2023-02-15 11:36:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:30,290 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2023-02-15 11:36:30,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 11:36:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2023-02-15 11:36:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 11:36:30,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:30,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:30,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 11:36:30,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 11:36:30,498 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2023-02-15 11:36:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:30,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38122221] [2023-02-15 11:36:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:30,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205781701] [2023-02-15 11:36:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:30,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:30,530 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:36:30,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 11:36:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:36:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 11:36:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 11:36:30,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:36:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:35,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38122221] [2023-02-15 11:36:35,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:35,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205781701] [2023-02-15 11:36:35,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205781701] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:36:35,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:36:35,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-02-15 11:36:35,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922588401] [2023-02-15 11:36:35,070 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:36:35,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:36:35,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:35,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:36:35,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=83, Unknown=2, NotChecked=0, Total=110 [2023-02-15 11:36:35,071 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:36:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:35,624 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2023-02-15 11:36:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:36:35,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-02-15 11:36:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:35,626 INFO L225 Difference]: With dead ends: 130 [2023-02-15 11:36:35,626 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 11:36:35,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=31, Invalid=99, Unknown=2, NotChecked=0, Total=132 [2023-02-15 11:36:35,626 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:35,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 11:36:35,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 11:36:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2023-02-15 11:36:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 87 states have internal predecessors, (94), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 11:36:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2023-02-15 11:36:35,643 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 34 [2023-02-15 11:36:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:35,643 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2023-02-15 11:36:35,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:36:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2023-02-15 11:36:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 11:36:35,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:35,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:35,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 11:36:35,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:35,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2023-02-15 11:36:35,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:35,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666535651] [2023-02-15 11:36:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:35,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:35,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:35,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808846493] [2023-02-15 11:36:35,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:36:35,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:35,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:35,886 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:36:35,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:36:36,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:36:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:36:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 11:36:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:36:36,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:36:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:36:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:36:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666535651] [2023-02-15 11:36:37,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:36:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808846493] [2023-02-15 11:36:37,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808846493] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:36:37,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:36:37,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-02-15 11:36:37,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747804298] [2023-02-15 11:36:37,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:36:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 11:36:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:36:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 11:36:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:36:37,494 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 11:36:38,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:36:38,444 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2023-02-15 11:36:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:36:38,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2023-02-15 11:36:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:36:38,447 INFO L225 Difference]: With dead ends: 160 [2023-02-15 11:36:38,447 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 11:36:38,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:36:38,448 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 11:36:38,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 165 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 11:36:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 11:36:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2023-02-15 11:36:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.15) internal successors, (69), 64 states have internal predecessors, (69), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 11:36:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2023-02-15 11:36:38,462 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 43 [2023-02-15 11:36:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:36:38,462 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2023-02-15 11:36:38,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 11:36:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2023-02-15 11:36:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 11:36:38,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:36:38,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:36:38,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 11:36:38,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 11:36:38,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:36:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:36:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2023-02-15 11:36:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:36:38,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098902743] [2023-02-15 11:36:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:36:38,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:36:38,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:36:38,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755918325] [2023-02-15 11:36:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:36:38,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:36:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:36:38,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:36:38,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:36:42,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 11:36:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:36:42,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 11:36:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:36:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:36:54,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:37:03,751 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse2 (div .cse0 2)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (= .cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (not (= .cse1 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (not (<= (mod .cse2 4294967296) (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse2 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse1)))) is different from true