./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/fermat1-ll_unwindbound100.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 ac7d6bbeae1af74610eb5ea0ec9cc56676532539c7535ebfdf72e0c17174815d --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:48:17,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:48:17,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:48:17,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:48:17,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:48:17,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:48:17,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:48:17,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:48:17,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:48:17,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:48:17,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:48:17,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:48:17,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:48:17,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:48:17,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:48:17,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:48:17,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:48:17,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:48:17,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:48:17,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:48:17,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:48:17,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:48:17,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:48:17,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:48:17,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:48:17,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:48:17,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:48:17,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:48:17,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:48:17,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:48:17,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:48:17,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:48:17,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:48:17,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:48:17,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:48:17,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:48:17,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:48:17,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:48:17,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:48:17,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:48:17,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:48:17,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:48:17,777 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:48:17,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:48:17,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:48:17,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:48:17,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:48:17,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:48:17,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:48:17,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:48:17,780 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:48:17,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:48:17,781 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:48:17,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:48:17,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:48:17,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:48:17,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:48:17,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:48:17,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:48:17,783 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:48:17,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:48:17,783 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:48:17,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:48:17,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:48:17,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:48:17,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:48:17,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:48:17,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:48:17,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:48:17,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:48:17,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:48:17,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:48:17,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:48:17,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:48:17,786 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:48:17,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:48:17,787 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:48:17,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac7d6bbeae1af74610eb5ea0ec9cc56676532539c7535ebfdf72e0c17174815d [2023-02-15 20:48:18,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:48:18,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:48:18,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:48:18,078 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:48:18,078 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:48:18,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2023-02-15 20:48:19,136 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:48:19,335 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:48:19,335 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2023-02-15 20:48:19,342 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a882818/2fd50fedb7d3426cbfcf62c285d3aa92/FLAG8367e42b0 [2023-02-15 20:48:19,360 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a882818/2fd50fedb7d3426cbfcf62c285d3aa92 [2023-02-15 20:48:19,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:48:19,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:48:19,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:48:19,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:48:19,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:48:19,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d17b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19, skipping insertion in model container [2023-02-15 20:48:19,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:48:19,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:48:19,537 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/fermat1-ll_unwindbound100.c[535,548] [2023-02-15 20:48:19,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:48:19,580 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:48:19,588 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/fermat1-ll_unwindbound100.c[535,548] [2023-02-15 20:48:19,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:48:19,605 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:48:19,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19 WrapperNode [2023-02-15 20:48:19,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:48:19,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:48:19,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:48:19,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:48:19,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,641 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 20:48:19,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:48:19,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:48:19,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:48:19,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:48:19,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,663 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:48:19,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:48:19,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:48:19,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:48:19,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (1/1) ... [2023-02-15 20:48:19,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:48:19,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:19,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 20:48:19,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 20:48:19,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:48:19,735 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:48:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:48:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:48:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:48:19,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:48:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:48:19,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:48:19,796 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:48:19,798 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:48:19,975 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:48:20,001 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:48:20,002 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 20:48:20,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:48:20 BoogieIcfgContainer [2023-02-15 20:48:20,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:48:20,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:48:20,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:48:20,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:48:20,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:48:19" (1/3) ... [2023-02-15 20:48:20,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f787fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:48:20, skipping insertion in model container [2023-02-15 20:48:20,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:19" (2/3) ... [2023-02-15 20:48:20,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f787fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:48:20, skipping insertion in model container [2023-02-15 20:48:20,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:48:20" (3/3) ... [2023-02-15 20:48:20,023 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound100.c [2023-02-15 20:48:20,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:48:20,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:48:20,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:48:20,136 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;@46129429, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:48:20,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:48:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 20:48:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 20:48:20,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:20,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:20,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:20,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:20,154 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2023-02-15 20:48:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:20,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888304979] [2023-02-15 20:48:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:20,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803771174] [2023-02-15 20:48:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:20,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:20,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:48:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:48:20,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:48:20,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:20,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:20,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888304979] [2023-02-15 20:48:20,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:20,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803771174] [2023-02-15 20:48:20,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803771174] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:20,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:20,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:48:20,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859545994] [2023-02-15 20:48:20,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:20,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:48:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:48:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:48:20,480 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 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) [2023-02-15 20:48:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:20,507 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2023-02-15 20:48:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:48:20,510 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 [2023-02-15 20:48:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:20,517 INFO L225 Difference]: With dead ends: 61 [2023-02-15 20:48:20,517 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 20:48:20,520 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 [2023-02-15 20:48:20,523 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:20,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 20:48:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 20:48:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:48:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 20:48:20,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2023-02-15 20:48:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:20,563 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 20:48:20,564 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) [2023-02-15 20:48:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 20:48:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:48:20,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:20,566 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:20,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:20,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 20:48:20,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2023-02-15 20:48:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156063601] [2023-02-15 20:48:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:20,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:20,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722644875] [2023-02-15 20:48:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:20,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:20,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:48:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:20,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:48:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:20,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:20,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:20,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156063601] [2023-02-15 20:48:20,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722644875] [2023-02-15 20:48:20,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722644875] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:20,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:20,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:48:20,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670015512] [2023-02-15 20:48:20,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:20,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:48:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:48:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:20,965 INFO L87 Difference]: Start difference. First operand 28 states and 37 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) [2023-02-15 20:48:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:20,998 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-02-15 20:48:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:48:20,999 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 [2023-02-15 20:48:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:21,000 INFO L225 Difference]: With dead ends: 37 [2023-02-15 20:48:21,000 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 20:48:21,001 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 [2023-02-15 20:48:21,003 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 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 [2023-02-15 20:48:21,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 20:48:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 20:48:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:48:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 20:48:21,018 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-02-15 20:48:21,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:21,019 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 20:48:21,020 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) [2023-02-15 20:48:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 20:48:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:48:21,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:21,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:21,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 20:48:21,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2023-02-15 20:48:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:21,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778203641] [2023-02-15 20:48:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:21,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:21,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:21,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37720941] [2023-02-15 20:48:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:21,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:21,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:21,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:21,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:48:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:48:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:21,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:21,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:21,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778203641] [2023-02-15 20:48:21,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:21,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37720941] [2023-02-15 20:48:21,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37720941] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:21,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:21,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:48:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807268464] [2023-02-15 20:48:21,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:21,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:48:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:48:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:21,434 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2023-02-15 20:48:23,610 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 [] [2023-02-15 20:48:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:25,937 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-02-15 20:48:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:48:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2023-02-15 20:48:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:25,939 INFO L225 Difference]: With dead ends: 49 [2023-02-15 20:48:25,939 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 20:48:25,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:48:25,940 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:25,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 103 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-02-15 20:48:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 20:48:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-15 20:48:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 20:48:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2023-02-15 20:48:25,959 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2023-02-15 20:48:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:25,959 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2023-02-15 20:48:25,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2023-02-15 20:48:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2023-02-15 20:48:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 20:48:25,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:25,963 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] [2023-02-15 20:48:25,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 20:48:26,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:26,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2023-02-15 20:48:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:26,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723165361] [2023-02-15 20:48:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:26,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:26,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:26,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134513686] [2023-02-15 20:48:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:26,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:26,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:26,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:48:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:26,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 20:48:26,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:26,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:26,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:26,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723165361] [2023-02-15 20:48:26,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:26,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134513686] [2023-02-15 20:48:26,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134513686] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:26,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:26,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-15 20:48:26,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646474215] [2023-02-15 20:48:26,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:26,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 20:48:26,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 20:48:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:48:26,441 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:48:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:26,608 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-15 20:48:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:48:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-02-15 20:48:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:26,615 INFO L225 Difference]: With dead ends: 53 [2023-02-15 20:48:26,615 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 20:48:26,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:26,620 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:26,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 139 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 20:48:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-15 20:48:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 20:48:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-02-15 20:48:26,646 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 25 [2023-02-15 20:48:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:26,647 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-02-15 20:48:26,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:48:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-02-15 20:48:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:48:26,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:26,649 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, 1, 1, 1, 1] [2023-02-15 20:48:26,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 20:48:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:26,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2023-02-15 20:48:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:26,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237714959] [2023-02-15 20:48:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:26,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:26,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:26,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435078820] [2023-02-15 20:48:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:26,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:26,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:26,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:48:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:48:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:26,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:26,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237714959] [2023-02-15 20:48:26,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:26,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435078820] [2023-02-15 20:48:26,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435078820] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:26,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:26,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:48:26,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883116657] [2023-02-15 20:48:26,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:48:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:48:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:26,956 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 20:48:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:26,988 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2023-02-15 20:48:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:48:26,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 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 31 [2023-02-15 20:48:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:26,990 INFO L225 Difference]: With dead ends: 93 [2023-02-15 20:48:26,990 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 20:48:26,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:26,991 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:26,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 20:48:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-15 20:48:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:48:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-02-15 20:48:27,020 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 31 [2023-02-15 20:48:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:27,020 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-02-15 20:48:27,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 20:48:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-02-15 20:48:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:48:27,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:27,023 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 20:48:27,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:27,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:27,228 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:27,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2023-02-15 20:48:27,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:27,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396670660] [2023-02-15 20:48:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:27,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:27,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:27,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509729656] [2023-02-15 20:48:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:27,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:27,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:27,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:48:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:48:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:27,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:48:27,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:27,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396670660] [2023-02-15 20:48:27,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:27,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509729656] [2023-02-15 20:48:27,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509729656] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:48:27,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:48:27,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-02-15 20:48:27,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692252730] [2023-02-15 20:48:27,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:27,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:48:27,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:48:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:48:27,389 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 20:48:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:27,452 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2023-02-15 20:48:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:48:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-02-15 20:48:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:27,455 INFO L225 Difference]: With dead ends: 102 [2023-02-15 20:48:27,456 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 20:48:27,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:48:27,457 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:27,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 20:48:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-02-15 20:48:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 20:48:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-02-15 20:48:27,481 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2023-02-15 20:48:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:27,481 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-02-15 20:48:27,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 20:48:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-02-15 20:48:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:48:27,483 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:27,483 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 20:48:27,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:27,688 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2023-02-15 20:48:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:27,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967883475] [2023-02-15 20:48:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:27,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:27,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974706395] [2023-02-15 20:48:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:27,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:27,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:27,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:27,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:48:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:48:27,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:48:27,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:27,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967883475] [2023-02-15 20:48:27,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974706395] [2023-02-15 20:48:27,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974706395] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:27,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:27,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 20:48:27,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103295531] [2023-02-15 20:48:27,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:27,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:48:27,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:48:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:48:27,894 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 20:48:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:28,041 INFO L93 Difference]: Finished difference Result 189 states and 243 transitions. [2023-02-15 20:48:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:48:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2023-02-15 20:48:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:28,043 INFO L225 Difference]: With dead ends: 189 [2023-02-15 20:48:28,044 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 20:48:28,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:28,047 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:28,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 212 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 20:48:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2023-02-15 20:48:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 103 states have internal predecessors, (126), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-15 20:48:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2023-02-15 20:48:28,103 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 39 [2023-02-15 20:48:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:28,104 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2023-02-15 20:48:28,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 20:48:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2023-02-15 20:48:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:48:28,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:28,108 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2023-02-15 20:48:28,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:28,313 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 [2023-02-15 20:48:28,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2023-02-15 20:48:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125787220] [2023-02-15 20:48:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:28,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496494793] [2023-02-15 20:48:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:28,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:28,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:28,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:28,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:48:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:48:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:48:28,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:28,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:28,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125787220] [2023-02-15 20:48:28,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:28,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496494793] [2023-02-15 20:48:28,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496494793] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:28,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:28,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:48:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546745054] [2023-02-15 20:48:28,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:28,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:48:28,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:48:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:28,405 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 20:48:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:28,462 INFO L93 Difference]: Finished difference Result 231 states and 306 transitions. [2023-02-15 20:48:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:48:28,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-02-15 20:48:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:28,465 INFO L225 Difference]: With dead ends: 231 [2023-02-15 20:48:28,466 INFO L226 Difference]: Without dead ends: 176 [2023-02-15 20:48:28,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:28,467 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:28,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 85 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-15 20:48:28,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 158. [2023-02-15 20:48:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 120 states have internal predecessors, (148), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-15 20:48:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 203 transitions. [2023-02-15 20:48:28,497 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 203 transitions. Word has length 43 [2023-02-15 20:48:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:28,497 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 203 transitions. [2023-02-15 20:48:28,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 20:48:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 203 transitions. [2023-02-15 20:48:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 20:48:28,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:28,499 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1] [2023-02-15 20:48:28,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:28,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 20:48:28,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2023-02-15 20:48:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:28,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227748084] [2023-02-15 20:48:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:28,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:28,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:28,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129703459] [2023-02-15 20:48:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:28,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:28,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:28,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:28,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:48:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:48:28,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:28,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:48:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227748084] [2023-02-15 20:48:28,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:28,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129703459] [2023-02-15 20:48:28,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129703459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:28,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:28,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-15 20:48:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610520878] [2023-02-15 20:48:28,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:28,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:48:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:48:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:48:28,934 INFO L87 Difference]: Start difference. First operand 158 states and 203 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 20:48:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:29,115 INFO L93 Difference]: Finished difference Result 347 states and 460 transitions. [2023-02-15 20:48:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 20:48:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2023-02-15 20:48:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:29,118 INFO L225 Difference]: With dead ends: 347 [2023-02-15 20:48:29,118 INFO L226 Difference]: Without dead ends: 262 [2023-02-15 20:48:29,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:48:29,119 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 75 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:29,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 250 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-15 20:48:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 240. [2023-02-15 20:48:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 180 states have (on average 1.25) internal successors, (225), 182 states have internal predecessors, (225), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-02-15 20:48:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 312 transitions. [2023-02-15 20:48:29,175 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 312 transitions. Word has length 45 [2023-02-15 20:48:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:29,176 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 312 transitions. [2023-02-15 20:48:29,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 20:48:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 312 transitions. [2023-02-15 20:48:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:48:29,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:29,180 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2023-02-15 20:48:29,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:29,385 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2023-02-15 20:48:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:29,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598379771] [2023-02-15 20:48:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:29,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513742941] [2023-02-15 20:48:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:29,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:29,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:29,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:48:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 20:48:29,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:29,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:48:29,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:29,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598379771] [2023-02-15 20:48:29,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:29,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513742941] [2023-02-15 20:48:29,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513742941] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:29,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:29,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 20:48:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393931563] [2023-02-15 20:48:29,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:29,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:48:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:48:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:29,651 INFO L87 Difference]: Start difference. First operand 240 states and 312 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 20:48:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:29,908 INFO L93 Difference]: Finished difference Result 342 states and 455 transitions. [2023-02-15 20:48:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:48:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2023-02-15 20:48:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:29,911 INFO L225 Difference]: With dead ends: 342 [2023-02-15 20:48:29,911 INFO L226 Difference]: Without dead ends: 337 [2023-02-15 20:48:29,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:48:29,912 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 133 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:29,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 236 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-02-15 20:48:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 323. [2023-02-15 20:48:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 241 states have (on average 1.2323651452282158) internal successors, (297), 248 states have internal predecessors, (297), 62 states have call successors, (62), 20 states have call predecessors, (62), 19 states have return successors, (61), 54 states have call predecessors, (61), 61 states have call successors, (61) [2023-02-15 20:48:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 420 transitions. [2023-02-15 20:48:29,981 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 420 transitions. Word has length 51 [2023-02-15 20:48:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:29,982 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 420 transitions. [2023-02-15 20:48:29,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 20:48:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 420 transitions. [2023-02-15 20:48:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 20:48:29,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:29,984 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 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] [2023-02-15 20:48:29,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 20:48:30,188 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2023-02-15 20:48:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:30,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808618545] [2023-02-15 20:48:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:30,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:30,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236184952] [2023-02-15 20:48:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:30,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:30,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:30,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:30,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:48:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 20:48:30,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-15 20:48:30,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-15 20:48:30,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:30,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808618545] [2023-02-15 20:48:30,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:30,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236184952] [2023-02-15 20:48:30,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236184952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:30,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:30,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-02-15 20:48:30,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591042795] [2023-02-15 20:48:30,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:30,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:48:30,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:30,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:48:30,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:30,376 INFO L87 Difference]: Start difference. First operand 323 states and 420 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:48:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:30,498 INFO L93 Difference]: Finished difference Result 579 states and 783 transitions. [2023-02-15 20:48:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:48:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-02-15 20:48:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:30,503 INFO L225 Difference]: With dead ends: 579 [2023-02-15 20:48:30,503 INFO L226 Difference]: Without dead ends: 387 [2023-02-15 20:48:30,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:30,505 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 18 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:30,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-02-15 20:48:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 384. [2023-02-15 20:48:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 290 states have (on average 1.2413793103448276) internal successors, (360), 296 states have internal predecessors, (360), 74 states have call successors, (74), 20 states have call predecessors, (74), 19 states have return successors, (73), 67 states have call predecessors, (73), 73 states have call successors, (73) [2023-02-15 20:48:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 507 transitions. [2023-02-15 20:48:30,598 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 507 transitions. Word has length 87 [2023-02-15 20:48:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:30,600 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 507 transitions. [2023-02-15 20:48:30,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:48:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 507 transitions. [2023-02-15 20:48:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 20:48:30,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:30,602 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 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] [2023-02-15 20:48:30,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:30,807 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 [2023-02-15 20:48:30,807 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:30,807 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2023-02-15 20:48:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:30,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010121494] [2023-02-15 20:48:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:30,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:30,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482662993] [2023-02-15 20:48:30,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:48:30,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:30,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:30,819 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) [2023-02-15 20:48:30,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:48:30,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:48:30,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:30,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:48:30,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:48:31,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-15 20:48:31,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010121494] [2023-02-15 20:48:31,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482662993] [2023-02-15 20:48:31,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482662993] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:31,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:31,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-02-15 20:48:31,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387598910] [2023-02-15 20:48:31,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:31,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:48:31,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:48:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:48:31,191 INFO L87 Difference]: Start difference. First operand 384 states and 507 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 20:48:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:31,805 INFO L93 Difference]: Finished difference Result 1131 states and 1582 transitions. [2023-02-15 20:48:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 20:48:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2023-02-15 20:48:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:31,810 INFO L225 Difference]: With dead ends: 1131 [2023-02-15 20:48:31,810 INFO L226 Difference]: Without dead ends: 966 [2023-02-15 20:48:31,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:48:31,811 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 263 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:31,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 436 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:48:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2023-02-15 20:48:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 911. [2023-02-15 20:48:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 691 states have (on average 1.2416787264833575) internal successors, (858), 702 states have internal predecessors, (858), 188 states have call successors, (188), 32 states have call predecessors, (188), 31 states have return successors, (187), 176 states have call predecessors, (187), 187 states have call successors, (187) [2023-02-15 20:48:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1233 transitions. [2023-02-15 20:48:31,983 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1233 transitions. Word has length 87 [2023-02-15 20:48:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:31,984 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1233 transitions. [2023-02-15 20:48:31,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 20:48:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1233 transitions. [2023-02-15 20:48:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 20:48:31,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:31,986 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:31,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:32,191 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 [2023-02-15 20:48:32,192 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2023-02-15 20:48:32,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167456911] [2023-02-15 20:48:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:32,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:32,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855719860] [2023-02-15 20:48:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:32,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:32,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:32,203 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) [2023-02-15 20:48:32,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:48:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:32,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 20:48:32,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:32,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-15 20:48:32,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167456911] [2023-02-15 20:48:32,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855719860] [2023-02-15 20:48:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855719860] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:32,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:32,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-02-15 20:48:32,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223442519] [2023-02-15 20:48:32,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:32,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:48:32,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:48:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:48:32,683 INFO L87 Difference]: Start difference. First operand 911 states and 1233 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 20:48:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:33,418 INFO L93 Difference]: Finished difference Result 1475 states and 1988 transitions. [2023-02-15 20:48:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 20:48:33,419 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2023-02-15 20:48:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:33,422 INFO L225 Difference]: With dead ends: 1475 [2023-02-15 20:48:33,423 INFO L226 Difference]: Without dead ends: 873 [2023-02-15 20:48:33,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:48:33,426 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 434 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:33,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 497 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:48:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-02-15 20:48:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 818. [2023-02-15 20:48:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 614 states have (on average 1.201954397394137) internal successors, (738), 618 states have internal predecessors, (738), 164 states have call successors, (164), 40 states have call predecessors, (164), 39 states have return successors, (163), 159 states have call predecessors, (163), 163 states have call successors, (163) [2023-02-15 20:48:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1065 transitions. [2023-02-15 20:48:33,548 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1065 transitions. Word has length 93 [2023-02-15 20:48:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:33,548 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1065 transitions. [2023-02-15 20:48:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 20:48:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1065 transitions. [2023-02-15 20:48:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 20:48:33,550 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:33,550 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:33,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:33,756 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 [2023-02-15 20:48:33,756 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2023-02-15 20:48:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:33,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297715422] [2023-02-15 20:48:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:33,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:33,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543682092] [2023-02-15 20:48:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:33,767 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) [2023-02-15 20:48:33,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 20:48:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:48:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:34,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-15 20:48:34,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297715422] [2023-02-15 20:48:34,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:34,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543682092] [2023-02-15 20:48:34,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543682092] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:34,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:34,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-15 20:48:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35781395] [2023-02-15 20:48:34,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:34,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 20:48:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 20:48:34,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-15 20:48:34,269 INFO L87 Difference]: Start difference. First operand 818 states and 1065 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-15 20:48:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:35,027 INFO L93 Difference]: Finished difference Result 941 states and 1237 transitions. [2023-02-15 20:48:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 20:48:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 99 [2023-02-15 20:48:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:35,032 INFO L225 Difference]: With dead ends: 941 [2023-02-15 20:48:35,032 INFO L226 Difference]: Without dead ends: 936 [2023-02-15 20:48:35,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 20:48:35,034 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 360 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:35,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 423 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 20:48:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2023-02-15 20:48:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 920. [2023-02-15 20:48:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 692 states have (on average 1.1820809248554913) internal successors, (818), 698 states have internal predecessors, (818), 184 states have call successors, (184), 44 states have call predecessors, (184), 43 states have return successors, (183), 177 states have call predecessors, (183), 183 states have call successors, (183) [2023-02-15 20:48:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1185 transitions. [2023-02-15 20:48:35,165 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1185 transitions. Word has length 99 [2023-02-15 20:48:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:35,166 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1185 transitions. [2023-02-15 20:48:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-15 20:48:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1185 transitions. [2023-02-15 20:48:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-02-15 20:48:35,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:35,172 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:35,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:35,378 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 [2023-02-15 20:48:35,378 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1985812011, now seen corresponding path program 3 times [2023-02-15 20:48:35,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:35,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38447264] [2023-02-15 20:48:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:35,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:35,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:35,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947238608] [2023-02-15 20:48:35,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:48:35,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:35,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:35,404 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) [2023-02-15 20:48:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 20:48:35,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 20:48:35,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 20:48:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2023-02-15 20:48:35,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:35,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38447264] [2023-02-15 20:48:35,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947238608] [2023-02-15 20:48:35,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947238608] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:35,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:35,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:48:35,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723951828] [2023-02-15 20:48:35,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:35,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:48:35,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:48:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:35,498 INFO L87 Difference]: Start difference. First operand 920 states and 1185 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:48:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:35,686 INFO L93 Difference]: Finished difference Result 1266 states and 1656 transitions. [2023-02-15 20:48:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:48:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 177 [2023-02-15 20:48:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:35,691 INFO L225 Difference]: With dead ends: 1266 [2023-02-15 20:48:35,691 INFO L226 Difference]: Without dead ends: 1013 [2023-02-15 20:48:35,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:48:35,694 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:35,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 149 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-02-15 20:48:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 960. [2023-02-15 20:48:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 726 states have (on average 1.1707988980716253) internal successors, (850), 732 states have internal predecessors, (850), 188 states have call successors, (188), 46 states have call predecessors, (188), 45 states have return successors, (187), 181 states have call predecessors, (187), 187 states have call successors, (187) [2023-02-15 20:48:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1225 transitions. [2023-02-15 20:48:35,827 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1225 transitions. Word has length 177 [2023-02-15 20:48:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1225 transitions. [2023-02-15 20:48:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:48:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1225 transitions. [2023-02-15 20:48:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 20:48:35,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:35,839 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:35,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:36,044 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 [2023-02-15 20:48:36,044 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1801897766, now seen corresponding path program 4 times [2023-02-15 20:48:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:36,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592828827] [2023-02-15 20:48:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:36,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:36,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902952972] [2023-02-15 20:48:36,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:48:36,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:36,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:36,066 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) [2023-02-15 20:48:36,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 20:48:36,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:48:36,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 20:48:36,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2023-02-15 20:48:36,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:36,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592828827] [2023-02-15 20:48:36,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:36,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902952972] [2023-02-15 20:48:36,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902952972] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:36,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:36,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:48:36,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017624999] [2023-02-15 20:48:36,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:36,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:48:36,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:48:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:48:36,180 INFO L87 Difference]: Start difference. First operand 960 states and 1225 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 20:48:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:36,342 INFO L93 Difference]: Finished difference Result 1545 states and 2001 transitions. [2023-02-15 20:48:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:48:36,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 183 [2023-02-15 20:48:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:36,347 INFO L225 Difference]: With dead ends: 1545 [2023-02-15 20:48:36,347 INFO L226 Difference]: Without dead ends: 1021 [2023-02-15 20:48:36,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:48:36,351 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:36,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2023-02-15 20:48:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 952. [2023-02-15 20:48:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 721 states have (on average 1.1650485436893203) internal successors, (840), 729 states have internal predecessors, (840), 185 states have call successors, (185), 46 states have call predecessors, (185), 45 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2023-02-15 20:48:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1209 transitions. [2023-02-15 20:48:36,475 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1209 transitions. Word has length 183 [2023-02-15 20:48:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:36,476 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 1209 transitions. [2023-02-15 20:48:36,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 20:48:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1209 transitions. [2023-02-15 20:48:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 20:48:36,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:36,484 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:36,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:36,689 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 [2023-02-15 20:48:36,689 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash -670817854, now seen corresponding path program 5 times [2023-02-15 20:48:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:36,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607721019] [2023-02-15 20:48:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:36,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:36,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475331691] [2023-02-15 20:48:36,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:48:36,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:36,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:36,703 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) [2023-02-15 20:48:36,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:48:36,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-15 20:48:36,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:48:36,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2023-02-15 20:48:36,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:36,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607721019] [2023-02-15 20:48:36,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475331691] [2023-02-15 20:48:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475331691] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:36,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:36,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:48:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579303220] [2023-02-15 20:48:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:48:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:48:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:36,925 INFO L87 Difference]: Start difference. First operand 952 states and 1209 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 20:48:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:37,060 INFO L93 Difference]: Finished difference Result 1005 states and 1267 transitions. [2023-02-15 20:48:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:48:37,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 183 [2023-02-15 20:48:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:37,067 INFO L225 Difference]: With dead ends: 1005 [2023-02-15 20:48:37,067 INFO L226 Difference]: Without dead ends: 920 [2023-02-15 20:48:37,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:37,069 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:37,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-02-15 20:48:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 899. [2023-02-15 20:48:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 681 states have (on average 1.15712187958884) internal successors, (788), 688 states have internal predecessors, (788), 172 states have call successors, (172), 46 states have call predecessors, (172), 45 states have return successors, (171), 164 states have call predecessors, (171), 171 states have call successors, (171) [2023-02-15 20:48:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1131 transitions. [2023-02-15 20:48:37,200 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1131 transitions. Word has length 183 [2023-02-15 20:48:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:37,201 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1131 transitions. [2023-02-15 20:48:37,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 20:48:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1131 transitions. [2023-02-15 20:48:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 20:48:37,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:37,203 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:37,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-15 20:48:37,404 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 [2023-02-15 20:48:37,404 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1332064508, now seen corresponding path program 6 times [2023-02-15 20:48:37,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:37,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457407284] [2023-02-15 20:48:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:37,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:37,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:37,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195284976] [2023-02-15 20:48:37,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:48:37,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:37,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:37,414 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) [2023-02-15 20:48:37,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 20:48:39,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-15 20:48:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:39,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:48:39,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 92 proven. 240 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2023-02-15 20:48:40,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 260 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2023-02-15 20:48:40,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:40,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457407284] [2023-02-15 20:48:40,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:40,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195284976] [2023-02-15 20:48:40,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195284976] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:40,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:40,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2023-02-15 20:48:40,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680597365] [2023-02-15 20:48:40,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:40,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:48:40,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:48:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:48:40,609 INFO L87 Difference]: Start difference. First operand 899 states and 1131 transitions. Second operand has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 21 states have internal predecessors, (132), 21 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2023-02-15 20:48:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:44,353 INFO L93 Difference]: Finished difference Result 3969 states and 5435 transitions. [2023-02-15 20:48:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-15 20:48:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 21 states have internal predecessors, (132), 21 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) Word has length 183 [2023-02-15 20:48:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:44,367 INFO L225 Difference]: With dead ends: 3969 [2023-02-15 20:48:44,368 INFO L226 Difference]: Without dead ends: 3746 [2023-02-15 20:48:44,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=976, Invalid=3994, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 20:48:44,371 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 320 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:44,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1842 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 20:48:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2023-02-15 20:48:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 2130. [2023-02-15 20:48:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1611 states have (on average 1.207324643078833) internal successors, (1945), 1637 states have internal predecessors, (1945), 473 states have call successors, (473), 46 states have call predecessors, (473), 45 states have return successors, (472), 446 states have call predecessors, (472), 472 states have call successors, (472) [2023-02-15 20:48:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2890 transitions. [2023-02-15 20:48:44,823 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2890 transitions. Word has length 183 [2023-02-15 20:48:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:44,823 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 2890 transitions. [2023-02-15 20:48:44,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 21 states have internal predecessors, (132), 21 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2023-02-15 20:48:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2890 transitions. [2023-02-15 20:48:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 20:48:44,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:44,832 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:44,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:45,040 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 [2023-02-15 20:48:45,042 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1762868398, now seen corresponding path program 7 times [2023-02-15 20:48:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:45,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175490329] [2023-02-15 20:48:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:45,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:45,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:45,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397219720] [2023-02-15 20:48:45,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:48:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:45,063 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) [2023-02-15 20:48:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 20:48:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:45,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 20:48:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-15 20:48:45,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-02-15 20:48:45,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:45,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175490329] [2023-02-15 20:48:45,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:45,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397219720] [2023-02-15 20:48:45,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397219720] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:45,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:45,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-02-15 20:48:45,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231900393] [2023-02-15 20:48:45,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:45,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:48:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:48:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:45,468 INFO L87 Difference]: Start difference. First operand 2130 states and 2890 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-15 20:48:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:47,066 INFO L93 Difference]: Finished difference Result 4536 states and 6277 transitions. [2023-02-15 20:48:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:48:47,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 183 [2023-02-15 20:48:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:47,080 INFO L225 Difference]: With dead ends: 4536 [2023-02-15 20:48:47,080 INFO L226 Difference]: Without dead ends: 3776 [2023-02-15 20:48:47,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 20:48:47,084 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 197 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:47,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 713 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 20:48:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2023-02-15 20:48:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3047. [2023-02-15 20:48:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 2301 states have (on average 1.1899174272055628) internal successors, (2738), 2348 states have internal predecessors, (2738), 700 states have call successors, (700), 46 states have call predecessors, (700), 45 states have return successors, (699), 652 states have call predecessors, (699), 699 states have call successors, (699) [2023-02-15 20:48:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 4137 transitions. [2023-02-15 20:48:47,840 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 4137 transitions. Word has length 183 [2023-02-15 20:48:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:47,840 INFO L495 AbstractCegarLoop]: Abstraction has 3047 states and 4137 transitions. [2023-02-15 20:48:47,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-15 20:48:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 4137 transitions. [2023-02-15 20:48:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 20:48:47,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:47,853 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:47,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:48,058 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 [2023-02-15 20:48:48,059 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash 144972548, now seen corresponding path program 8 times [2023-02-15 20:48:48,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26239214] [2023-02-15 20:48:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:48,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:48,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892785782] [2023-02-15 20:48:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:48:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:48,072 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) [2023-02-15 20:48:48,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 20:48:48,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:48:48,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:48:48,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2023-02-15 20:48:48,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2023-02-15 20:48:48,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26239214] [2023-02-15 20:48:48,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892785782] [2023-02-15 20:48:48,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892785782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:48,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:48,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-02-15 20:48:48,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825965237] [2023-02-15 20:48:48,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:48,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:48:48,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:48:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:48:48,655 INFO L87 Difference]: Start difference. First operand 3047 states and 4137 transitions. Second operand has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2023-02-15 20:48:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:53,986 INFO L93 Difference]: Finished difference Result 7412 states and 10306 transitions. [2023-02-15 20:48:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-15 20:48:53,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) Word has length 183 [2023-02-15 20:48:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:54,014 INFO L225 Difference]: With dead ends: 7412 [2023-02-15 20:48:54,014 INFO L226 Difference]: Without dead ends: 6958 [2023-02-15 20:48:54,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2758 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1198, Invalid=7922, Unknown=0, NotChecked=0, Total=9120 [2023-02-15 20:48:54,021 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 366 mSDsluCounter, 3004 mSDsCounter, 0 mSdLazyCounter, 4599 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 4915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 4599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:54,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 3489 Invalid, 4915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 4599 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-15 20:48:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2023-02-15 20:48:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 5199. [2023-02-15 20:48:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5199 states, 3918 states have (on average 1.209800918836141) internal successors, (4740), 4013 states have internal predecessors, (4740), 1235 states have call successors, (1235), 46 states have call predecessors, (1235), 45 states have return successors, (1234), 1139 states have call predecessors, (1234), 1234 states have call successors, (1234) [2023-02-15 20:48:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5199 states to 5199 states and 7209 transitions. [2023-02-15 20:48:55,454 INFO L78 Accepts]: Start accepts. Automaton has 5199 states and 7209 transitions. Word has length 183 [2023-02-15 20:48:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:55,455 INFO L495 AbstractCegarLoop]: Abstraction has 5199 states and 7209 transitions. [2023-02-15 20:48:55,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2023-02-15 20:48:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5199 states and 7209 transitions. [2023-02-15 20:48:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 20:48:55,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:55,473 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:55,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:55,679 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 [2023-02-15 20:48:55,679 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1027204868, now seen corresponding path program 9 times [2023-02-15 20:48:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452137411] [2023-02-15 20:48:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:55,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:55,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:55,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614515787] [2023-02-15 20:48:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:48:55,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:55,693 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) [2023-02-15 20:48:55,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process