./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/egcd3-ll_unwindbound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:21:26,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:21:26,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:21:26,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:21:26,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:21:26,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:21:26,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:21:26,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:21:26,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:21:26,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:21:26,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:21:26,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:21:26,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:21:26,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:21:26,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:21:26,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:21:26,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:21:26,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:21:26,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:21:26,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:21:26,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:21:26,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:21:26,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:21:26,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:21:26,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:21:26,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:21:26,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:21:26,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:21:26,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:21:26,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:21:26,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:21:26,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:21:26,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:21:26,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:21:26,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:21:26,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:21:26,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:21:26,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:21:26,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:21:26,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:21:26,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:21:26,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 17:21:26,480 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:21:26,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:21:26,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:21:26,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:21:26,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:21:26,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:21:26,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:21:26,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:21:26,483 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:21:26,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:21:26,484 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:21:26,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 17:21:26,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:21:26,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:21:26,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:21:26,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:21:26,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:21:26,485 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:21:26,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:21:26,485 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:21:26,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:21:26,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:21:26,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:21:26,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:21:26,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:21:26,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:21:26,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:21:26,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:21:26,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 17:21:26,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 17:21:26,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:21:26,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:21:26,487 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:21:26,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:21:26,487 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:21:26,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef [2023-02-18 17:21:26,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:21:26,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:21:26,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:21:26,698 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:21:26,698 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:21:26,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2023-02-18 17:21:27,558 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:21:27,739 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:21:27,739 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2023-02-18 17:21:27,745 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5739560a/6b3013911b894e22b7f19f7535d8bc2f/FLAGa7ab50fca [2023-02-18 17:21:27,758 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5739560a/6b3013911b894e22b7f19f7535d8bc2f [2023-02-18 17:21:27,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:21:27,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:21:27,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:21:27,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:21:27,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:21:27,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb02e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27, skipping insertion in model container [2023-02-18 17:21:27,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:21:27,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:21:27,889 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/egcd3-ll_unwindbound10.c[490,503] [2023-02-18 17:21:27,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:21:27,922 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:21:27,930 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/egcd3-ll_unwindbound10.c[490,503] [2023-02-18 17:21:27,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:21:27,949 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:21:27,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27 WrapperNode [2023-02-18 17:21:27,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:21:27,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:21:27,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:21:27,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:21:27,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,973 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2023-02-18 17:21:27,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:21:27,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:21:27,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:21:27,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:21:27,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,989 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:27,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:21:28,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:21:28,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:21:28,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:21:28,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (1/1) ... [2023-02-18 17:21:28,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:21:28,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:28,023 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) [2023-02-18 17:21:28,028 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 [2023-02-18 17:21:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:21:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 17:21:28,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 17:21:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 17:21:28,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:21:28,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:21:28,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:21:28,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:21:28,094 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:21:28,096 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:21:28,256 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:21:28,260 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:21:28,260 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 17:21:28,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:21:28 BoogieIcfgContainer [2023-02-18 17:21:28,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:21:28,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:21:28,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:21:28,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:21:28,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:21:27" (1/3) ... [2023-02-18 17:21:28,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71723671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:21:28, skipping insertion in model container [2023-02-18 17:21:28,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:21:27" (2/3) ... [2023-02-18 17:21:28,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71723671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:21:28, skipping insertion in model container [2023-02-18 17:21:28,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:21:28" (3/3) ... [2023-02-18 17:21:28,282 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2023-02-18 17:21:28,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:21:28,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:21:28,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:21:28,359 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;@5e21bfd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:21:28,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:21:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 17:21:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 17:21:28,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:28,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:28,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2023-02-18 17:21:28,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:28,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005718531] [2023-02-18 17:21:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:28,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:28,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005718531] [2023-02-18 17:21:28,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 17:21:28,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010833563] [2023-02-18 17:21:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:28,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:28,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:28,449 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) [2023-02-18 17:21:28,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 17:21:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:28,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:21:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 17:21:28,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:28,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010833563] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:28,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:28,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:21:28,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924114702] [2023-02-18 17:21:28,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:28,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:21:28,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:21:28,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:21:28,546 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 17:21:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:28,589 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2023-02-18 17:21:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:21:28,591 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-18 17:21:28,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:28,609 INFO L225 Difference]: With dead ends: 67 [2023-02-18 17:21:28,609 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 17:21:28,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:21:28,613 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2023-02-18 17:21:28,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 17:21:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 17:21:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 17:21:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-02-18 17:21:28,638 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2023-02-18 17:21:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:28,638 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-02-18 17:21:28,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 17:21:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-02-18 17:21:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 17:21:28,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:28,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:28,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 17:21:28,841 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 [2023-02-18 17:21:28,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2023-02-18 17:21:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:28,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414739803] [2023-02-18 17:21:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:28,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:28,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353605631] [2023-02-18 17:21:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:28,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:28,868 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) [2023-02-18 17:21:28,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 17:21:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 17:21:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:28,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:28,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:28,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414739803] [2023-02-18 17:21:28,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:28,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353605631] [2023-02-18 17:21:28,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353605631] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:28,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:28,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 17:21:28,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236926740] [2023-02-18 17:21:28,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:28,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 17:21:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 17:21:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:21:28,937 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-02-18 17:21:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:28,951 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-02-18 17:21:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 17:21:28,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 19 [2023-02-18 17:21:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:28,953 INFO L225 Difference]: With dead ends: 40 [2023-02-18 17:21:28,953 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 17:21:28,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:21:28,954 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:28,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 17:21:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-18 17:21:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 17:21:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-18 17:21:28,962 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-02-18 17:21:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:28,966 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-18 17:21:28,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-02-18 17:21:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-18 17:21:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 17:21:28,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:28,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:28,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:29,171 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 [2023-02-18 17:21:29,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2023-02-18 17:21:29,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:29,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623571820] [2023-02-18 17:21:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:29,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:29,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:29,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949428688] [2023-02-18 17:21:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:29,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:29,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:29,188 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) [2023-02-18 17:21:29,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 17:21:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:21:29,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 17:21:29,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:29,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623571820] [2023-02-18 17:21:29,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949428688] [2023-02-18 17:21:29,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949428688] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:29,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:29,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 17:21:29,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051243299] [2023-02-18 17:21:29,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:29,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 17:21:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:29,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 17:21:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:21:29,267 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 17:21:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:29,342 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-02-18 17:21:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:21:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-18 17:21:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:29,346 INFO L225 Difference]: With dead ends: 53 [2023-02-18 17:21:29,346 INFO L226 Difference]: Without dead ends: 46 [2023-02-18 17:21:29,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 17:21:29,349 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:29,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-18 17:21:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-02-18 17:21:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 17:21:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-02-18 17:21:29,367 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2023-02-18 17:21:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:29,367 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-02-18 17:21:29,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 17:21:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-02-18 17:21:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 17:21:29,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:29,369 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, 1] [2023-02-18 17:21:29,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:29,577 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 [2023-02-18 17:21:29,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2023-02-18 17:21:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:29,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130698379] [2023-02-18 17:21:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:29,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:29,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:29,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369682662] [2023-02-18 17:21:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:29,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:29,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:29,599 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) [2023-02-18 17:21:29,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 17:21:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:29,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:21:29,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:29,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:29,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130698379] [2023-02-18 17:21:29,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:29,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369682662] [2023-02-18 17:21:29,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369682662] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:29,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:29,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 17:21:29,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290752206] [2023-02-18 17:21:29,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:21:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:21:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:21:29,666 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2023-02-18 17:21:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:29,681 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-02-18 17:21:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 17:21:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2023-02-18 17:21:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:29,682 INFO L225 Difference]: With dead ends: 58 [2023-02-18 17:21:29,682 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 17:21:29,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:21:29,683 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:29,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 17:21:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-18 17:21:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 17:21:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-02-18 17:21:29,687 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2023-02-18 17:21:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:29,688 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-02-18 17:21:29,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2023-02-18 17:21:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-02-18 17:21:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 17:21:29,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:29,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:29,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 17:21:29,901 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 [2023-02-18 17:21:29,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2023-02-18 17:21:29,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:29,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598933081] [2023-02-18 17:21:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:29,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:29,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856511507] [2023-02-18 17:21:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:29,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:29,925 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) [2023-02-18 17:21:29,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 17:21:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 17:21:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 17:21:30,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:30,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598933081] [2023-02-18 17:21:30,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856511507] [2023-02-18 17:21:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856511507] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:30,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:30,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 17:21:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713701113] [2023-02-18 17:21:30,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:30,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 17:21:30,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 17:21:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:21:30,009 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 17:21:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:30,093 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-02-18 17:21:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 17:21:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-18 17:21:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:30,095 INFO L225 Difference]: With dead ends: 54 [2023-02-18 17:21:30,095 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 17:21:30,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 17:21:30,096 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:30,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 17:21:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-18 17:21:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 17:21:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-02-18 17:21:30,111 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2023-02-18 17:21:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:30,112 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-02-18 17:21:30,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 17:21:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-02-18 17:21:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 17:21:30,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:30,129 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, 1, 1] [2023-02-18 17:21:30,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 17:21:30,332 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 [2023-02-18 17:21:30,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2023-02-18 17:21:30,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:30,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501416688] [2023-02-18 17:21:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:30,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:30,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:30,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055430547] [2023-02-18 17:21:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:30,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:30,344 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) [2023-02-18 17:21:30,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 17:21:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:21:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:30,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501416688] [2023-02-18 17:21:30,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055430547] [2023-02-18 17:21:30,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055430547] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:30,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:30,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 17:21:30,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885460847] [2023-02-18 17:21:30,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:30,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 17:21:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:30,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 17:21:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:21:30,413 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2023-02-18 17:21:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:30,515 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2023-02-18 17:21:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 17:21:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 26 [2023-02-18 17:21:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:30,517 INFO L225 Difference]: With dead ends: 147 [2023-02-18 17:21:30,517 INFO L226 Difference]: Without dead ends: 140 [2023-02-18 17:21:30,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:21:30,518 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:30,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-18 17:21:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2023-02-18 17:21:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 17:21:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-18 17:21:30,529 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2023-02-18 17:21:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:30,530 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-18 17:21:30,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2023-02-18 17:21:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-18 17:21:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 17:21:30,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:30,534 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, 1, 1] [2023-02-18 17:21:30,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 17:21:30,740 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 [2023-02-18 17:21:30,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2023-02-18 17:21:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:30,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491494752] [2023-02-18 17:21:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:30,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:30,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312037546] [2023-02-18 17:21:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:30,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:30,757 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) [2023-02-18 17:21:30,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 17:21:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:21:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 17:21:30,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 17:21:30,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:30,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491494752] [2023-02-18 17:21:30,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:30,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312037546] [2023-02-18 17:21:30,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312037546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:30,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:30,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 17:21:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262948390] [2023-02-18 17:21:30,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 17:21:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 17:21:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:21:30,887 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 17:21:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:31,059 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2023-02-18 17:21:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 17:21:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-18 17:21:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:31,062 INFO L225 Difference]: With dead ends: 183 [2023-02-18 17:21:31,062 INFO L226 Difference]: Without dead ends: 171 [2023-02-18 17:21:31,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:21:31,063 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:31,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-18 17:21:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2023-02-18 17:21:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 17:21:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2023-02-18 17:21:31,098 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2023-02-18 17:21:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:31,099 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2023-02-18 17:21:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 17:21:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2023-02-18 17:21:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 17:21:31,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:31,113 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, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:31,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:31,313 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 [2023-02-18 17:21:31,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2023-02-18 17:21:31,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:31,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741047569] [2023-02-18 17:21:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:31,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:31,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:31,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883178175] [2023-02-18 17:21:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:31,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:31,353 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) [2023-02-18 17:21:31,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 17:21:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:21:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:31,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:31,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741047569] [2023-02-18 17:21:31,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883178175] [2023-02-18 17:21:31,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883178175] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:21:31,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:21:31,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 17:21:31,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250672672] [2023-02-18 17:21:31,496 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:31,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:21:31,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:21:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:21:31,497 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 17:21:31,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:31,564 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2023-02-18 17:21:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:21:31,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-18 17:21:31,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:31,565 INFO L225 Difference]: With dead ends: 143 [2023-02-18 17:21:31,565 INFO L226 Difference]: Without dead ends: 141 [2023-02-18 17:21:31,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:21:31,566 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:31,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-18 17:21:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-02-18 17:21:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 17:21:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2023-02-18 17:21:31,574 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2023-02-18 17:21:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:31,574 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2023-02-18 17:21:31,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 17:21:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2023-02-18 17:21:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 17:21:31,575 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:31,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:31,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:31,781 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 [2023-02-18 17:21:31,782 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:31,782 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2023-02-18 17:21:31,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:31,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465383422] [2023-02-18 17:21:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:31,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:31,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:31,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721703160] [2023-02-18 17:21:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:31,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:31,790 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) [2023-02-18 17:21:31,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 17:21:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 17:21:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:31,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:31,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465383422] [2023-02-18 17:21:31,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721703160] [2023-02-18 17:21:31,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721703160] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:31,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:31,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-02-18 17:21:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670401225] [2023-02-18 17:21:31,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:21:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:21:31,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:21:31,901 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 17:21:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:32,059 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2023-02-18 17:21:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 17:21:32,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-18 17:21:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:32,061 INFO L225 Difference]: With dead ends: 175 [2023-02-18 17:21:32,061 INFO L226 Difference]: Without dead ends: 173 [2023-02-18 17:21:32,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-18 17:21:32,063 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 50 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:32,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 370 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-18 17:21:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2023-02-18 17:21:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 17:21:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2023-02-18 17:21:32,077 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2023-02-18 17:21:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:32,077 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2023-02-18 17:21:32,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 17:21:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2023-02-18 17:21:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 17:21:32,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:32,078 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, 1] [2023-02-18 17:21:32,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:32,282 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 [2023-02-18 17:21:32,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:32,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2023-02-18 17:21:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93279621] [2023-02-18 17:21:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:32,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:32,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642245761] [2023-02-18 17:21:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:32,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:32,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:32,298 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) [2023-02-18 17:21:32,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 17:21:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:32,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:21:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:32,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:32,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:32,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93279621] [2023-02-18 17:21:32,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:32,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642245761] [2023-02-18 17:21:32,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642245761] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:32,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:32,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:21:32,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015663664] [2023-02-18 17:21:32,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:32,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 17:21:32,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 17:21:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:21:32,348 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2023-02-18 17:21:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:32,364 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2023-02-18 17:21:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:21:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 32 [2023-02-18 17:21:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:32,366 INFO L225 Difference]: With dead ends: 237 [2023-02-18 17:21:32,366 INFO L226 Difference]: Without dead ends: 170 [2023-02-18 17:21:32,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:21:32,367 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:32,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 109 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-18 17:21:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-02-18 17:21:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 17:21:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2023-02-18 17:21:32,378 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2023-02-18 17:21:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:32,378 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2023-02-18 17:21:32,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2023-02-18 17:21:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2023-02-18 17:21:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 17:21:32,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:32,379 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:32,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:32,583 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 [2023-02-18 17:21:32,583 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2023-02-18 17:21:32,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:32,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443546648] [2023-02-18 17:21:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:32,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:32,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183688093] [2023-02-18 17:21:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:32,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:32,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:32,595 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) [2023-02-18 17:21:32,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 17:21:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 17:21:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 17:21:32,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 17:21:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:32,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443546648] [2023-02-18 17:21:32,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:32,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183688093] [2023-02-18 17:21:32,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183688093] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:21:32,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:21:32,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-18 17:21:32,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781987530] [2023-02-18 17:21:32,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:32,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 17:21:32,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 17:21:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:21:32,701 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 17:21:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:32,741 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2023-02-18 17:21:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:21:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-18 17:21:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:32,743 INFO L225 Difference]: With dead ends: 235 [2023-02-18 17:21:32,743 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 17:21:32,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:21:32,744 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:32,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 17:21:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2023-02-18 17:21:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 17:21:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2023-02-18 17:21:32,758 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2023-02-18 17:21:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:32,759 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2023-02-18 17:21:32,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 17:21:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2023-02-18 17:21:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 17:21:32,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:32,759 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, 1, 1, 1] [2023-02-18 17:21:32,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 17:21:32,964 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2023-02-18 17:21:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:32,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124589019] [2023-02-18 17:21:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:32,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:32,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499546112] [2023-02-18 17:21:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:32,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:32,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:32,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 17:21:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 17:21:33,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 17:21:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124589019] [2023-02-18 17:21:33,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499546112] [2023-02-18 17:21:33,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499546112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:33,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:33,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2023-02-18 17:21:33,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452827646] [2023-02-18 17:21:33,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:33,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 17:21:33,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 17:21:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:21:33,125 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 17:21:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:34,935 INFO L93 Difference]: Finished difference Result 393 states and 571 transitions. [2023-02-18 17:21:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 17:21:34,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2023-02-18 17:21:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:34,938 INFO L225 Difference]: With dead ends: 393 [2023-02-18 17:21:34,938 INFO L226 Difference]: Without dead ends: 391 [2023-02-18 17:21:34,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2023-02-18 17:21:34,939 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 263 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 121 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:34,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 271 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 619 Invalid, 7 Unknown, 0 Unchecked, 1.7s Time] [2023-02-18 17:21:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-02-18 17:21:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 375. [2023-02-18 17:21:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 277 states have (on average 1.4151624548736461) internal successors, (392), 292 states have internal predecessors, (392), 81 states have call successors, (81), 16 states have call predecessors, (81), 16 states have return successors, (80), 66 states have call predecessors, (80), 80 states have call successors, (80) [2023-02-18 17:21:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 553 transitions. [2023-02-18 17:21:34,986 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 553 transitions. Word has length 37 [2023-02-18 17:21:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:34,986 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 553 transitions. [2023-02-18 17:21:34,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 17:21:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 553 transitions. [2023-02-18 17:21:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 17:21:34,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:34,987 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:34,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:35,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 17:21:35,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2023-02-18 17:21:35,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:35,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228897116] [2023-02-18 17:21:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:35,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:35,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:35,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112483578] [2023-02-18 17:21:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:35,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:35,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:35,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:35,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 17:21:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:35,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 17:21:35,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 17:21:35,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:21:35,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:35,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228897116] [2023-02-18 17:21:35,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:35,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112483578] [2023-02-18 17:21:35,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112483578] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:21:35,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:21:35,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-18 17:21:35,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087320330] [2023-02-18 17:21:35,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:35,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:21:35,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:35,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:21:35,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:21:35,275 INFO L87 Difference]: Start difference. First operand 375 states and 553 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 17:21:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:35,338 INFO L93 Difference]: Finished difference Result 385 states and 562 transitions. [2023-02-18 17:21:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:21:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-02-18 17:21:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:35,340 INFO L225 Difference]: With dead ends: 385 [2023-02-18 17:21:35,340 INFO L226 Difference]: Without dead ends: 383 [2023-02-18 17:21:35,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:21:35,341 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:35,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-18 17:21:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 379. [2023-02-18 17:21:35,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 280 states have (on average 1.4035714285714285) internal successors, (393), 295 states have internal predecessors, (393), 81 states have call successors, (81), 17 states have call predecessors, (81), 17 states have return successors, (80), 66 states have call predecessors, (80), 80 states have call successors, (80) [2023-02-18 17:21:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 554 transitions. [2023-02-18 17:21:35,394 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 554 transitions. Word has length 40 [2023-02-18 17:21:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:35,394 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 554 transitions. [2023-02-18 17:21:35,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 17:21:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 554 transitions. [2023-02-18 17:21:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 17:21:35,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:35,395 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:35,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 17:21:35,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2023-02-18 17:21:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:35,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456082827] [2023-02-18 17:21:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:35,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:35,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722575743] [2023-02-18 17:21:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:35,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:35,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:35,606 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:35,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 17:21:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:35,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:21:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 17:21:35,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 17:21:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456082827] [2023-02-18 17:21:35,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722575743] [2023-02-18 17:21:35,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722575743] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:35,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:35,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-18 17:21:35,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818738004] [2023-02-18 17:21:35,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:35,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:21:35,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:35,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:21:35,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:21:35,694 INFO L87 Difference]: Start difference. First operand 379 states and 554 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2023-02-18 17:21:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:35,860 INFO L93 Difference]: Finished difference Result 906 states and 1306 transitions. [2023-02-18 17:21:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 17:21:35,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 38 [2023-02-18 17:21:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:35,863 INFO L225 Difference]: With dead ends: 906 [2023-02-18 17:21:35,863 INFO L226 Difference]: Without dead ends: 643 [2023-02-18 17:21:35,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-02-18 17:21:35,865 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 133 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:35,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 323 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-02-18 17:21:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 613. [2023-02-18 17:21:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 442 states have (on average 1.3438914027149322) internal successors, (594), 460 states have internal predecessors, (594), 132 states have call successors, (132), 38 states have call predecessors, (132), 38 states have return successors, (128), 114 states have call predecessors, (128), 128 states have call successors, (128) [2023-02-18 17:21:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 854 transitions. [2023-02-18 17:21:35,931 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 854 transitions. Word has length 38 [2023-02-18 17:21:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:35,932 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 854 transitions. [2023-02-18 17:21:35,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2023-02-18 17:21:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 854 transitions. [2023-02-18 17:21:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 17:21:35,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:35,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:35,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:36,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:36,137 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:36,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2023-02-18 17:21:36,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:36,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743813775] [2023-02-18 17:21:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:36,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:36,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923710197] [2023-02-18 17:21:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:36,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:36,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:36,144 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:36,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 17:21:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 17:21:36,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:36,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 17:21:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743813775] [2023-02-18 17:21:36,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923710197] [2023-02-18 17:21:36,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923710197] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:36,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:36,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 17:21:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800207244] [2023-02-18 17:21:36,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:36,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:21:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:21:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:21:36,234 INFO L87 Difference]: Start difference. First operand 613 states and 854 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2023-02-18 17:21:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:36,465 INFO L93 Difference]: Finished difference Result 1319 states and 1867 transitions. [2023-02-18 17:21:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 17:21:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 39 [2023-02-18 17:21:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:36,469 INFO L225 Difference]: With dead ends: 1319 [2023-02-18 17:21:36,469 INFO L226 Difference]: Without dead ends: 936 [2023-02-18 17:21:36,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-02-18 17:21:36,471 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 190 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:36,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 374 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2023-02-18 17:21:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 896. [2023-02-18 17:21:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 640 states have (on average 1.309375) internal successors, (838), 662 states have internal predecessors, (838), 202 states have call successors, (202), 53 states have call predecessors, (202), 53 states have return successors, (196), 180 states have call predecessors, (196), 196 states have call successors, (196) [2023-02-18 17:21:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1236 transitions. [2023-02-18 17:21:36,600 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1236 transitions. Word has length 39 [2023-02-18 17:21:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:36,600 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1236 transitions. [2023-02-18 17:21:36,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2023-02-18 17:21:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1236 transitions. [2023-02-18 17:21:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 17:21:36,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:36,601 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:36,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:36,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 17:21:36,807 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -827121215, now seen corresponding path program 2 times [2023-02-18 17:21:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730725397] [2023-02-18 17:21:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:36,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:36,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:36,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557401056] [2023-02-18 17:21:36,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:21:36,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:36,820 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:36,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 17:21:36,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:21:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:21:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:21:36,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 17:21:36,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:36,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730725397] [2023-02-18 17:21:36,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557401056] [2023-02-18 17:21:36,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557401056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:36,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:36,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:21:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840850531] [2023-02-18 17:21:36,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:21:36,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:36,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:21:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:21:36,867 INFO L87 Difference]: Start difference. First operand 896 states and 1236 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2023-02-18 17:21:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:37,022 INFO L93 Difference]: Finished difference Result 1403 states and 1987 transitions. [2023-02-18 17:21:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:21:37,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 40 [2023-02-18 17:21:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:37,025 INFO L225 Difference]: With dead ends: 1403 [2023-02-18 17:21:37,026 INFO L226 Difference]: Without dead ends: 1035 [2023-02-18 17:21:37,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 17:21:37,027 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:37,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 154 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2023-02-18 17:21:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 857. [2023-02-18 17:21:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 622 states have (on average 1.3054662379421222) internal successors, (812), 644 states have internal predecessors, (812), 182 states have call successors, (182), 52 states have call predecessors, (182), 52 states have return successors, (176), 160 states have call predecessors, (176), 176 states have call successors, (176) [2023-02-18 17:21:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1170 transitions. [2023-02-18 17:21:37,117 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1170 transitions. Word has length 40 [2023-02-18 17:21:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:37,117 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1170 transitions. [2023-02-18 17:21:37,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2023-02-18 17:21:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1170 transitions. [2023-02-18 17:21:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 17:21:37,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:37,118 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:37,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:37,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 17:21:37,324 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:37,324 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2023-02-18 17:21:37,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:37,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603023234] [2023-02-18 17:21:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:37,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:37,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:37,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516180465] [2023-02-18 17:21:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:37,331 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:37,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 17:21:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 17:21:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-18 17:21:37,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 17:21:38,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603023234] [2023-02-18 17:21:38,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516180465] [2023-02-18 17:21:38,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516180465] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:38,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:38,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-18 17:21:38,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528332877] [2023-02-18 17:21:38,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:38,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:21:38,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:21:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-02-18 17:21:38,206 INFO L87 Difference]: Start difference. First operand 857 states and 1170 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:21:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:47,458 INFO L93 Difference]: Finished difference Result 1526 states and 2080 transitions. [2023-02-18 17:21:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 17:21:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2023-02-18 17:21:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:47,463 INFO L225 Difference]: With dead ends: 1526 [2023-02-18 17:21:47,463 INFO L226 Difference]: Without dead ends: 1142 [2023-02-18 17:21:47,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 17:21:47,464 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 269 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:47,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 815 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-02-18 17:21:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2023-02-18 17:21:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 976. [2023-02-18 17:21:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 710 states have (on average 1.291549295774648) internal successors, (917), 728 states have internal predecessors, (917), 200 states have call successors, (200), 65 states have call predecessors, (200), 65 states have return successors, (196), 182 states have call predecessors, (196), 196 states have call successors, (196) [2023-02-18 17:21:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1313 transitions. [2023-02-18 17:21:47,627 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1313 transitions. Word has length 54 [2023-02-18 17:21:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:47,627 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1313 transitions. [2023-02-18 17:21:47,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:21:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1313 transitions. [2023-02-18 17:21:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 17:21:47,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:47,628 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:47,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:47,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 17:21:47,833 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2023-02-18 17:21:47,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:47,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719612952] [2023-02-18 17:21:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:47,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:47,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:47,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221211668] [2023-02-18 17:21:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:47,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:47,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:47,852 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:47,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 17:21:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:47,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 17:21:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 17:21:47,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 17:21:47,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719612952] [2023-02-18 17:21:47,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221211668] [2023-02-18 17:21:47,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221211668] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:47,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:47,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2023-02-18 17:21:47,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294869251] [2023-02-18 17:21:47,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:47,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:21:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:47,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:21:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:21:47,967 INFO L87 Difference]: Start difference. First operand 976 states and 1313 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:21:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:48,249 INFO L93 Difference]: Finished difference Result 1051 states and 1393 transitions. [2023-02-18 17:21:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 17:21:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2023-02-18 17:21:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:48,253 INFO L225 Difference]: With dead ends: 1051 [2023-02-18 17:21:48,253 INFO L226 Difference]: Without dead ends: 1029 [2023-02-18 17:21:48,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2023-02-18 17:21:48,254 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 168 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:48,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 276 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:21:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2023-02-18 17:21:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1006. [2023-02-18 17:21:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 740 states have (on average 1.2702702702702702) internal successors, (940), 758 states have internal predecessors, (940), 200 states have call successors, (200), 65 states have call predecessors, (200), 65 states have return successors, (196), 182 states have call predecessors, (196), 196 states have call successors, (196) [2023-02-18 17:21:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1336 transitions. [2023-02-18 17:21:48,408 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1336 transitions. Word has length 60 [2023-02-18 17:21:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:48,408 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 1336 transitions. [2023-02-18 17:21:48,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:21:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1336 transitions. [2023-02-18 17:21:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 17:21:48,409 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:48,409 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:48,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:48,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 17:21:48,613 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 1 times [2023-02-18 17:21:48,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:48,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700792396] [2023-02-18 17:21:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:48,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:48,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927693230] [2023-02-18 17:21:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:48,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:48,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:48,625 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:48,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 17:21:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 17:21:48,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 17:21:48,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:21:48,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:48,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700792396] [2023-02-18 17:21:48,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:48,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927693230] [2023-02-18 17:21:48,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927693230] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:21:48,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:21:48,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:21:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969377071] [2023-02-18 17:21:48,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:21:48,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:21:48,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:48,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:21:48,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:21:48,684 INFO L87 Difference]: Start difference. First operand 1006 states and 1336 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 17:21:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:48,884 INFO L93 Difference]: Finished difference Result 1713 states and 2359 transitions. [2023-02-18 17:21:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:21:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2023-02-18 17:21:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:48,887 INFO L225 Difference]: With dead ends: 1713 [2023-02-18 17:21:48,887 INFO L226 Difference]: Without dead ends: 1165 [2023-02-18 17:21:48,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:21:48,890 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:48,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:21:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2023-02-18 17:21:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1109. [2023-02-18 17:21:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 799 states have (on average 1.2740926157697121) internal successors, (1018), 812 states have internal predecessors, (1018), 244 states have call successors, (244), 65 states have call predecessors, (244), 65 states have return successors, (240), 231 states have call predecessors, (240), 240 states have call successors, (240) [2023-02-18 17:21:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1502 transitions. [2023-02-18 17:21:49,078 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1502 transitions. Word has length 69 [2023-02-18 17:21:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:49,078 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 1502 transitions. [2023-02-18 17:21:49,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 17:21:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1502 transitions. [2023-02-18 17:21:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 17:21:49,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:49,079 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:49,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 17:21:49,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:49,286 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 2 times [2023-02-18 17:21:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:49,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929077545] [2023-02-18 17:21:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:49,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663555438] [2023-02-18 17:21:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:21:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:49,295 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:49,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 17:21:49,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:21:49,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:21:49,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 17:21:49,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 17:21:49,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 17:21:50,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929077545] [2023-02-18 17:21:50,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663555438] [2023-02-18 17:21:50,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663555438] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:50,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:50,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-02-18 17:21:50,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840351405] [2023-02-18 17:21:50,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:50,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 17:21:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 17:21:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2023-02-18 17:21:50,671 INFO L87 Difference]: Start difference. First operand 1109 states and 1502 transitions. Second operand has 31 states, 29 states have (on average 2.793103448275862) internal successors, (81), 27 states have internal predecessors, (81), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-18 17:22:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:22:05,185 INFO L93 Difference]: Finished difference Result 1454 states and 1974 transitions. [2023-02-18 17:22:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 17:22:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.793103448275862) internal successors, (81), 27 states have internal predecessors, (81), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 71 [2023-02-18 17:22:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:22:05,189 INFO L225 Difference]: With dead ends: 1454 [2023-02-18 17:22:05,189 INFO L226 Difference]: Without dead ends: 1452 [2023-02-18 17:22:05,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=827, Invalid=3463, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 17:22:05,191 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 611 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:22:05,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 775 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-02-18 17:22:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2023-02-18 17:22:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1352. [2023-02-18 17:22:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 991 states have (on average 1.2916246215943492) internal successors, (1280), 1008 states have internal predecessors, (1280), 278 states have call successors, (278), 82 states have call predecessors, (278), 82 states have return successors, (274), 261 states have call predecessors, (274), 274 states have call successors, (274) [2023-02-18 17:22:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1832 transitions. [2023-02-18 17:22:05,508 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1832 transitions. Word has length 71 [2023-02-18 17:22:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:22:05,508 INFO L495 AbstractCegarLoop]: Abstraction has 1352 states and 1832 transitions. [2023-02-18 17:22:05,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.793103448275862) internal successors, (81), 27 states have internal predecessors, (81), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-18 17:22:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1832 transitions. [2023-02-18 17:22:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-18 17:22:05,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:22:05,513 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 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, 1, 1, 1, 1, 1] [2023-02-18 17:22:05,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 17:22:05,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:22:05,721 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:22:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:22:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash 940337767, now seen corresponding path program 1 times [2023-02-18 17:22:05,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:22:05,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78409362] [2023-02-18 17:22:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:22:05,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:22:05,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:22:05,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056921616] [2023-02-18 17:22:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:22:05,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:22:05,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:22:05,732 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:22:05,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 17:22:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:22:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 17:22:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:22:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-18 17:22:05,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:22:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-18 17:22:06,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:22:06,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78409362] [2023-02-18 17:22:06,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:22:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056921616] [2023-02-18 17:22:06,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056921616] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:22:06,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:22:06,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-18 17:22:06,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291580373] [2023-02-18 17:22:06,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:22:06,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 17:22:06,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:22:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 17:22:06,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-18 17:22:06,180 INFO L87 Difference]: Start difference. First operand 1352 states and 1832 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 17:22:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:22:08,836 INFO L93 Difference]: Finished difference Result 2176 states and 3126 transitions. [2023-02-18 17:22:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 17:22:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 85 [2023-02-18 17:22:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:22:08,843 INFO L225 Difference]: With dead ends: 2176 [2023-02-18 17:22:08,843 INFO L226 Difference]: Without dead ends: 2172 [2023-02-18 17:22:08,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 17:22:08,844 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 224 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:22:08,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 639 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 17:22:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2023-02-18 17:22:09,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1935. [2023-02-18 17:22:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1287 states have (on average 1.3442113442113441) internal successors, (1730), 1303 states have internal predecessors, (1730), 554 states have call successors, (554), 94 states have call predecessors, (554), 93 states have return successors, (550), 537 states have call predecessors, (550), 550 states have call successors, (550) [2023-02-18 17:22:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2834 transitions. [2023-02-18 17:22:09,517 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2834 transitions. Word has length 85 [2023-02-18 17:22:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:22:09,518 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 2834 transitions. [2023-02-18 17:22:09,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 17:22:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2834 transitions. [2023-02-18 17:22:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-18 17:22:09,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:22:09,519 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:22:09,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 17:22:09,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:22:09,724 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:22:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:22:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2023-02-18 17:22:09,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:22:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287688843] [2023-02-18 17:22:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:22:09,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:22:09,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:22:09,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371449253] [2023-02-18 17:22:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:22:09,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:22:09,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:22:09,730 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:22:09,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 17:22:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:22:09,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 17:22:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:22:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 17:22:09,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:22:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-18 17:22:14,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:22:14,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287688843] [2023-02-18 17:22:14,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:22:14,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371449253] [2023-02-18 17:22:14,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371449253] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:22:14,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:22:14,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-18 17:22:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131975347] [2023-02-18 17:22:14,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:22:14,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 17:22:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:22:14,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 17:22:14,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 17:22:14,996 INFO L87 Difference]: Start difference. First operand 1935 states and 2834 transitions. Second operand has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-18 17:22:24,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:26,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:37,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:39,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:43,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:45,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:53,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:55,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:23:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:02,398 INFO L93 Difference]: Finished difference Result 3004 states and 4450 transitions. [2023-02-18 17:23:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-18 17:23:02,398 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 84 [2023-02-18 17:23:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:02,407 INFO L225 Difference]: With dead ends: 3004 [2023-02-18 17:23:02,407 INFO L226 Difference]: Without dead ends: 2983 [2023-02-18 17:23:02,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2260, Invalid=9296, Unknown=0, NotChecked=0, Total=11556 [2023-02-18 17:23:02,411 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 680 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 683 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:02,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 979 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2479 Invalid, 8 Unknown, 0 Unchecked, 36.4s Time] [2023-02-18 17:23:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2023-02-18 17:23:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2492. [2023-02-18 17:23:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 1739 states have (on average 1.3755031627372052) internal successors, (2392), 1758 states have internal predecessors, (2392), 651 states have call successors, (651), 101 states have call predecessors, (651), 101 states have return successors, (648), 632 states have call predecessors, (648), 648 states have call successors, (648) [2023-02-18 17:23:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3691 transitions. [2023-02-18 17:23:03,827 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3691 transitions. Word has length 84 [2023-02-18 17:23:03,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:03,827 INFO L495 AbstractCegarLoop]: Abstraction has 2492 states and 3691 transitions. [2023-02-18 17:23:03,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-18 17:23:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3691 transitions. [2023-02-18 17:23:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 17:23:03,829 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:03,829 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:03,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 17:23:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:04,034 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1186023176, now seen corresponding path program 1 times [2023-02-18 17:23:04,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:23:04,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715378106] [2023-02-18 17:23:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:04,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:23:04,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:23:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345934918] [2023-02-18 17:23:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:04,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:23:04,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:23:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 17:23:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:23:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 17:23:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-18 17:23:04,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-18 17:23:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:23:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715378106] [2023-02-18 17:23:04,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:23:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345934918] [2023-02-18 17:23:04,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345934918] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:23:04,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:23:04,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-18 17:23:04,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177831312] [2023-02-18 17:23:04,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:23:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:23:04,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:23:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:23:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-02-18 17:23:04,884 INFO L87 Difference]: Start difference. First operand 2492 states and 3691 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 20 states have internal predecessors, (68), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 17:23:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:36,823 INFO L93 Difference]: Finished difference Result 3328 states and 5045 transitions. [2023-02-18 17:23:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-18 17:23:36,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 20 states have internal predecessors, (68), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 87 [2023-02-18 17:23:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:36,837 INFO L225 Difference]: With dead ends: 3328 [2023-02-18 17:23:36,837 INFO L226 Difference]: Without dead ends: 3322 [2023-02-18 17:23:36,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 17:23:36,840 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 335 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:36,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1072 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 22.3s Time] [2023-02-18 17:23:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3322 states. [2023-02-18 17:23:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3322 to 2897. [2023-02-18 17:23:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 1986 states have (on average 1.391238670694864) internal successors, (2763), 2005 states have internal predecessors, (2763), 802 states have call successors, (802), 109 states have call predecessors, (802), 108 states have return successors, (800), 782 states have call predecessors, (800), 800 states have call successors, (800) [2023-02-18 17:23:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4365 transitions. [2023-02-18 17:23:38,863 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4365 transitions. Word has length 87 [2023-02-18 17:23:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:38,863 INFO L495 AbstractCegarLoop]: Abstraction has 2897 states and 4365 transitions. [2023-02-18 17:23:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 20 states have internal predecessors, (68), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 17:23:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4365 transitions. [2023-02-18 17:23:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-18 17:23:38,865 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:38,865 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:38,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 17:23:39,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:39,071 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:39,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:39,071 INFO L85 PathProgramCache]: Analyzing trace with hash 704622192, now seen corresponding path program 1 times [2023-02-18 17:23:39,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:23:39,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733220332] [2023-02-18 17:23:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:39,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:23:39,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:23:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085825558] [2023-02-18 17:23:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:39,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:39,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:23:39,079 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:23:39,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 17:23:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:23:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 17:23:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 17:23:39,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 17:23:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:23:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733220332] [2023-02-18 17:23:39,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:23:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085825558] [2023-02-18 17:23:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085825558] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:23:39,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:23:39,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2023-02-18 17:23:39,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517099777] [2023-02-18 17:23:39,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:23:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 17:23:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:23:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 17:23:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:23:39,237 INFO L87 Difference]: Start difference. First operand 2897 states and 4365 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-02-18 17:23:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:41,326 INFO L93 Difference]: Finished difference Result 4233 states and 6520 transitions. [2023-02-18 17:23:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 17:23:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 93 [2023-02-18 17:23:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:41,335 INFO L225 Difference]: With dead ends: 4233 [2023-02-18 17:23:41,335 INFO L226 Difference]: Without dead ends: 2925 [2023-02-18 17:23:41,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2023-02-18 17:23:41,338 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 124 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:41,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 304 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:23:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2023-02-18 17:23:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2918. [2023-02-18 17:23:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2007 states have (on average 1.3816641753861485) internal successors, (2773), 2026 states have internal predecessors, (2773), 802 states have call successors, (802), 109 states have call predecessors, (802), 108 states have return successors, (800), 782 states have call predecessors, (800), 800 states have call successors, (800) [2023-02-18 17:23:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 4375 transitions. [2023-02-18 17:23:43,255 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 4375 transitions. Word has length 93 [2023-02-18 17:23:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:43,255 INFO L495 AbstractCegarLoop]: Abstraction has 2918 states and 4375 transitions. [2023-02-18 17:23:43,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-02-18 17:23:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 4375 transitions. [2023-02-18 17:23:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-18 17:23:43,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:43,256 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:43,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 17:23:43,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:43,462 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash 784770345, now seen corresponding path program 2 times [2023-02-18 17:23:43,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:23:43,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552043016] [2023-02-18 17:23:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:43,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:23:43,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:23:43,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904002966] [2023-02-18 17:23:43,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:23:43,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:43,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:23:43,469 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:23:43,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 17:23:43,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:23:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-18 17:23:43,546 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 17:23:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 17:23:43,611 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 17:23:43,611 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 17:23:43,612 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 17:23:43,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 17:23:43,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 17:23:43,821 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:43,823 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 17:23:43,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 05:23:43 BoogieIcfgContainer [2023-02-18 17:23:43,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 17:23:43,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 17:23:43,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 17:23:43,864 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 17:23:43,864 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:21:28" (3/4) ... [2023-02-18 17:23:43,865 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 17:23:43,948 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 17:23:43,948 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 17:23:43,949 INFO L158 Benchmark]: Toolchain (without parser) took 136187.34ms. Allocated memory was 138.4MB in the beginning and 933.2MB in the end (delta: 794.8MB). Free memory was 100.9MB in the beginning and 839.5MB in the end (delta: -738.6MB). Peak memory consumption was 58.9MB. Max. memory is 16.1GB. [2023-02-18 17:23:43,949 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 115.3MB. Free memory was 79.5MB in the beginning and 79.5MB in the end (delta: 24.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 17:23:43,950 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.75ms. Allocated memory is still 138.4MB. Free memory was 100.4MB in the beginning and 89.5MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 17:23:43,950 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.29ms. Allocated memory is still 138.4MB. Free memory was 89.5MB in the beginning and 88.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 17:23:43,950 INFO L158 Benchmark]: Boogie Preprocessor took 28.12ms. Allocated memory is still 138.4MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 17:23:43,952 INFO L158 Benchmark]: RCFGBuilder took 259.12ms. Allocated memory is still 138.4MB. Free memory was 86.8MB in the beginning and 75.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 17:23:43,952 INFO L158 Benchmark]: TraceAbstraction took 135600.78ms. Allocated memory was 138.4MB in the beginning and 933.2MB in the end (delta: 794.8MB). Free memory was 74.3MB in the beginning and 844.7MB in the end (delta: -770.4MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2023-02-18 17:23:43,952 INFO L158 Benchmark]: Witness Printer took 84.97ms. Allocated memory is still 933.2MB. Free memory was 844.7MB in the beginning and 839.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-02-18 17:23:43,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 115.3MB. Free memory was 79.5MB in the beginning and 79.5MB in the end (delta: 24.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.75ms. Allocated memory is still 138.4MB. Free memory was 100.4MB in the beginning and 89.5MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.29ms. Allocated memory is still 138.4MB. Free memory was 89.5MB in the beginning and 88.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.12ms. Allocated memory is still 138.4MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 259.12ms. Allocated memory is still 138.4MB. Free memory was 86.8MB in the beginning and 75.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 135600.78ms. Allocated memory was 138.4MB in the beginning and 933.2MB in the end (delta: 794.8MB). Free memory was 74.3MB in the beginning and 844.7MB in the end (delta: -770.4MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. * Witness Printer took 84.97ms. Allocated memory is still 933.2MB. Free memory was 844.7MB in the beginning and 839.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=4, y=7] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=4, y=7] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=4, b=7, counter=0, p=1, q=0, r=0, s=1, x=4, y=7] [L34] EXPR counter++ VAL [a=4, b=7, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=4, y=7] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=4, b=7, c=4, counter=1, k=0, p=1, q=0, r=0, s=1, x=4, y=7] [L41] EXPR counter++ VAL [a=4, b=7, c=4, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=4, y=7] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=4, b=7, c=4, counter=2, k=0, p=1, q=0, r=0, s=1, x=4, y=7] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=7, b=4, c=4, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=4, y=7] [L34] EXPR counter++ VAL [a=7, b=4, c=4, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=4, y=7] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=7, b=4, c=7, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=4, y=7] [L41] EXPR counter++ VAL [a=7, b=4, c=7, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=4, y=7] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=7, b=4, c=7, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L48] EXPR counter++ VAL [a=7, b=4, c=7, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=7, b=4, c=7, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=7, b=4, c=7, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=7, b=4, c=7, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=7, b=4, c=7, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L54] COND TRUE !(c >= 2 * v) VAL [a=7, b=4, c=7, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L59] c = c - v [L60] k = k + d VAL [a=7, b=4, c=3, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L41] EXPR counter++ VAL [a=7, b=4, c=3, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=7, b=4, c=3, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=4, x=4, y=7] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=4, b=3, c=3, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=4, x=4, y=7] [L34] EXPR counter++ VAL [a=4, b=3, c=3, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=4, x=4, y=7] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=4, b=3, c=4, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=4, x=4, y=7] [L41] EXPR counter++ VAL [a=4, b=3, c=4, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=4, x=4, y=7] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=4, b=3, c=4, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L48] EXPR counter++ VAL [a=4, b=3, c=4, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=3, c=4, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=3, c=4, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=4, b=3, c=4, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=4, b=3, c=4, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L54] COND TRUE !(c >= 2 * v) VAL [a=4, b=3, c=4, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L59] c = c - v [L60] k = k + d VAL [a=4, b=3, c=1, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L41] EXPR counter++ VAL [a=4, b=3, c=1, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=4, b=3, c=1, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=4, y=7] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=3, b=1, c=1, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=4, y=7] [L34] EXPR counter++ VAL [a=3, b=1, c=1, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=4, y=7] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 135.5s, OverallIterations: 25, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 111.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 15 mSolverCounterUnknown, 3481 SdHoareTripleChecker+Valid, 75.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3433 mSDsluCounter, 8152 SdHoareTripleChecker+Invalid, 74.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6792 mSDsCounter, 2416 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9812 IncrementalHoareTripleChecker+Invalid, 12243 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2416 mSolverCounterUnsat, 1360 mSDtfsCounter, 9812 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2140 GetRequests, 1582 SyntacticMatches, 28 SemanticMatches, 530 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8279 ImplicationChecksByTransitivity, 35.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2918occurred in iteration=24, InterpolantAutomatonStates: 440, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.4s AutomataMinimizationTime, 24 MinimizatonAttempts, 1883 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 1198 NumberOfCodeBlocks, 1198 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1855 ConstructedInterpolants, 7 QuantifiedInterpolants, 16870 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3578 ConjunctsInSsa, 520 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 1781/2277 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-18 17:23:44,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE