./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 11:45:55,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 11:45:55,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 11:45:55,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 11:45:55,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 11:45:55,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 11:45:55,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 11:45:55,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 11:45:55,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 11:45:55,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 11:45:55,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 11:45:55,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 11:45:55,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 11:45:55,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 11:45:55,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 11:45:55,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 11:45:55,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 11:45:55,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 11:45:55,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 11:45:55,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 11:45:55,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 11:45:55,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 11:45:55,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 11:45:55,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 11:45:55,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 11:45:55,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 11:45:55,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 11:45:55,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 11:45:55,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 11:45:55,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 11:45:55,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 11:45:55,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 11:45:55,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 11:45:55,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 11:45:55,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 11:45:55,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 11:45:55,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 11:45:55,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 11:45:55,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 11:45:55,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 11:45:55,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 11:45:55,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 11:45:55,590 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 11:45:55,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 11:45:55,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 11:45:55,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 11:45:55,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 11:45:55,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 11:45:55,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 11:45:55,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 11:45:55,594 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 11:45:55,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 11:45:55,594 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 11:45:55,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 11:45:55,596 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 11:45:55,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 11:45:55,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 11:45:55,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 11:45:55,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 11:45:55,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:45:55,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 11:45:55,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 11:45:55,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 11:45:55,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 11:45:55,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 11:45:55,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 11:45:55,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 11:45:55,598 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 11:45:55,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 11:45:55,598 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 11:45:55,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2023-02-14 11:45:55,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 11:45:55,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 11:45:55,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 11:45:55,754 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 11:45:55,755 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 11:45:55,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-14 11:45:56,660 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 11:45:56,793 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 11:45:56,794 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-14 11:45:56,799 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acab2b14a/bf9138800c084e5cb8fc3441b54100fe/FLAG55fcbea9a [2023-02-14 11:45:56,811 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acab2b14a/bf9138800c084e5cb8fc3441b54100fe [2023-02-14 11:45:56,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 11:45:56,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 11:45:56,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 11:45:56,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 11:45:56,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 11:45:56,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:56,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d27be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56, skipping insertion in model container [2023-02-14 11:45:56,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:56,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 11:45:56,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 11:45:56,934 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/egcd3-ll.c[490,503] [2023-02-14 11:45:56,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:45:56,957 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 11:45:56,967 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/egcd3-ll.c[490,503] [2023-02-14 11:45:56,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:45:56,981 INFO L208 MainTranslator]: Completed translation [2023-02-14 11:45:56,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56 WrapperNode [2023-02-14 11:45:56,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 11:45:56,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 11:45:56,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 11:45:56,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 11:45:56,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:56,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,006 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2023-02-14 11:45:57,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 11:45:57,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 11:45:57,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 11:45:57,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 11:45:57,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,036 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 11:45:57,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 11:45:57,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 11:45:57,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 11:45:57,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (1/1) ... [2023-02-14 11:45:57,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:45:57,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:57,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 11:45:57,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 11:45:57,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 11:45:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 11:45:57,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 11:45:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 11:45:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 11:45:57,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 11:45:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 11:45:57,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 11:45:57,140 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 11:45:57,143 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 11:45:57,247 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 11:45:57,252 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 11:45:57,253 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 11:45:57,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:45:57 BoogieIcfgContainer [2023-02-14 11:45:57,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 11:45:57,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 11:45:57,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 11:45:57,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 11:45:57,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:45:56" (1/3) ... [2023-02-14 11:45:57,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482f6ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:45:57, skipping insertion in model container [2023-02-14 11:45:57,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:56" (2/3) ... [2023-02-14 11:45:57,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482f6ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:45:57, skipping insertion in model container [2023-02-14 11:45:57,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:45:57" (3/3) ... [2023-02-14 11:45:57,269 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2023-02-14 11:45:57,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 11:45:57,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 11:45:57,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 11:45:57,349 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;@64e8b217, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 11:45:57,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 11:45:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:45:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 11:45:57,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:57,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:57,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2023-02-14 11:45:57,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:57,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631824269] [2023-02-14 11:45:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:57,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:57,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631824269] [2023-02-14 11:45:57,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 11:45:57,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445236348] [2023-02-14 11:45:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:57,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:57,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:57,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 11:45:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:57,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 11:45:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:45:57,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:45:57,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445236348] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:45:57,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:45:57,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 11:45:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070863560] [2023-02-14 11:45:57,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:57,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 11:45:57,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:57,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 11:45:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:45:57,599 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:45:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:57,614 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2023-02-14 11:45:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 11:45:57,616 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 [2023-02-14 11:45:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:57,620 INFO L225 Difference]: With dead ends: 61 [2023-02-14 11:45:57,621 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 11:45:57,622 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 [2023-02-14 11:45:57,625 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:57,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 11:45:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 11:45:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 11:45:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-02-14 11:45:57,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2023-02-14 11:45:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:57,650 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-02-14 11:45:57,650 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) [2023-02-14 11:45:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-02-14 11:45:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 11:45:57,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:57,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:57,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 11:45:57,852 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 [2023-02-14 11:45:57,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2023-02-14 11:45:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:57,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751115237] [2023-02-14 11:45:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:57,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:57,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583934174] [2023-02-14 11:45:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:57,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:57,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:57,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 11:45:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:57,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 11:45:57,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:45:57,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:45:57,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751115237] [2023-02-14 11:45:57,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583934174] [2023-02-14 11:45:57,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583934174] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:45:57,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:45:57,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 11:45:57,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775190405] [2023-02-14 11:45:57,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:57,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 11:45:57,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:57,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 11:45:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:45:57,982 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 11:45:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:58,074 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-02-14 11:45:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:45:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-14 11:45:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:58,075 INFO L225 Difference]: With dead ends: 47 [2023-02-14 11:45:58,075 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 11:45:58,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 11:45:58,076 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:58,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 104 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 11:45:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-02-14 11:45:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 11:45:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-14 11:45:58,087 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2023-02-14 11:45:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:58,087 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-14 11:45:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 11:45:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-14 11:45:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 11:45:58,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:58,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:58,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:58,294 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 [2023-02-14 11:45:58,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2023-02-14 11:45:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551443484] [2023-02-14 11:45:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:58,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:58,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715043295] [2023-02-14 11:45:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:58,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:58,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:58,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:58,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 11:45:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:58,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 11:45:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:45:58,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:45:58,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:58,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551443484] [2023-02-14 11:45:58,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:58,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715043295] [2023-02-14 11:45:58,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715043295] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:45:58,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:45:58,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 11:45:58,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309113068] [2023-02-14 11:45:58,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 11:45:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 11:45:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 11:45:58,540 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 11:45:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:58,624 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-14 11:45:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 11:45:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-14 11:45:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:58,628 INFO L225 Difference]: With dead ends: 46 [2023-02-14 11:45:58,628 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 11:45:58,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-14 11:45:58,632 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:58,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 11:45:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-02-14 11:45:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 11:45:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-02-14 11:45:58,640 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2023-02-14 11:45:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:58,640 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-02-14 11:45:58,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 11:45:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-02-14 11:45:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 11:45:58,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:58,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:58,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:58,845 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 [2023-02-14 11:45:58,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2023-02-14 11:45:58,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:58,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173150736] [2023-02-14 11:45:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:58,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:58,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844213594] [2023-02-14 11:45:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:58,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:58,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 11:45:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:58,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 11:45:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:45:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:45:59,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:59,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173150736] [2023-02-14 11:45:59,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:59,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844213594] [2023-02-14 11:45:59,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844213594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:59,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:45:59,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-14 11:45:59,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297979815] [2023-02-14 11:45:59,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:59,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 11:45:59,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 11:45:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 11:45:59,023 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:45:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:59,181 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2023-02-14 11:45:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 11:45:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-14 11:45:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:59,182 INFO L225 Difference]: With dead ends: 96 [2023-02-14 11:45:59,183 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 11:45:59,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:45:59,184 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:59,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 11:45:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2023-02-14 11:45:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 11:45:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2023-02-14 11:45:59,195 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2023-02-14 11:45:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:59,195 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2023-02-14 11:45:59,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:45:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2023-02-14 11:45:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 11:45:59,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:59,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:59,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:59,400 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 [2023-02-14 11:45:59,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2023-02-14 11:45:59,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:59,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933272198] [2023-02-14 11:45:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:59,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:59,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256880992] [2023-02-14 11:45:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:59,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:59,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:59,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:59,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 11:45:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 11:45:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:45:59,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933272198] [2023-02-14 11:46:02,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256880992] [2023-02-14 11:46:02,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256880992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:02,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:46:02,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-14 11:46:02,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713218350] [2023-02-14 11:46:02,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:46:02,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:02,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:46:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:46:02,394 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 11:46:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:02,650 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2023-02-14 11:46:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:46:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-02-14 11:46:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:02,651 INFO L225 Difference]: With dead ends: 79 [2023-02-14 11:46:02,651 INFO L226 Difference]: Without dead ends: 77 [2023-02-14 11:46:02,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-14 11:46:02,652 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:02,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:46:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-14 11:46:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-02-14 11:46:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 11:46:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2023-02-14 11:46:02,664 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2023-02-14 11:46:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:02,664 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2023-02-14 11:46:02,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 11:46:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2023-02-14 11:46:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 11:46:02,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:02,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:02,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:02,871 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 [2023-02-14 11:46:02,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2023-02-14 11:46:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:02,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500663685] [2023-02-14 11:46:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:02,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:02,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562518068] [2023-02-14 11:46:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:02,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:02,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 11:46:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 11:46:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:46:03,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:03,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:03,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500663685] [2023-02-14 11:46:03,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562518068] [2023-02-14 11:46:03,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562518068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:03,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:46:03,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-14 11:46:03,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913524527] [2023-02-14 11:46:03,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:03,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:46:03,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:46:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:46:03,104 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:46:03,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:03,387 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-02-14 11:46:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 11:46:03,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-02-14 11:46:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:03,388 INFO L225 Difference]: With dead ends: 104 [2023-02-14 11:46:03,388 INFO L226 Difference]: Without dead ends: 102 [2023-02-14 11:46:03,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-14 11:46:03,389 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:03,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 253 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:46:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-14 11:46:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-02-14 11:46:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-14 11:46:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2023-02-14 11:46:03,402 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2023-02-14 11:46:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:03,403 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2023-02-14 11:46:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:46:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2023-02-14 11:46:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:46:03,404 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:03,404 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:03,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:03,608 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 [2023-02-14 11:46:03,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:03,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:03,609 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2023-02-14 11:46:03,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:03,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102048652] [2023-02-14 11:46:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:03,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:03,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779808289] [2023-02-14 11:46:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:03,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:03,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:03,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:03,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 11:46:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 11:46:03,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 11:46:03,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:46:03,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102048652] [2023-02-14 11:46:03,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779808289] [2023-02-14 11:46:03,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779808289] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:03,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:46:03,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-14 11:46:03,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882882018] [2023-02-14 11:46:03,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:46:03,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 11:46:03,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:03,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 11:46:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 11:46:03,789 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:46:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:03,842 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2023-02-14 11:46:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:46:03,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-14 11:46:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:03,845 INFO L225 Difference]: With dead ends: 144 [2023-02-14 11:46:03,845 INFO L226 Difference]: Without dead ends: 142 [2023-02-14 11:46:03,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:46:03,848 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:03,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:46:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-14 11:46:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-02-14 11:46:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-14 11:46:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2023-02-14 11:46:03,900 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2023-02-14 11:46:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:03,900 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2023-02-14 11:46:03,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:46:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2023-02-14 11:46:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:46:03,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:03,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:03,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:04,108 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 [2023-02-14 11:46:04,108 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:04,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2023-02-14 11:46:04,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:04,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414365029] [2023-02-14 11:46:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:04,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:04,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:04,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359774003] [2023-02-14 11:46:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:04,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:04,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:04,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:04,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 11:46:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:04,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-14 11:46:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:46:04,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:04,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:04,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414365029] [2023-02-14 11:46:04,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:04,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359774003] [2023-02-14 11:46:04,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359774003] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:04,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:46:04,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-02-14 11:46:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156119879] [2023-02-14 11:46:04,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:04,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 11:46:04,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 11:46:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:46:04,553 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 11:46:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:10,461 INFO L93 Difference]: Finished difference Result 183 states and 256 transitions. [2023-02-14 11:46:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 11:46:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-02-14 11:46:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:10,463 INFO L225 Difference]: With dead ends: 183 [2023-02-14 11:46:10,464 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 11:46:10,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 11:46:10,465 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:10,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 138 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-14 11:46:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 11:46:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2023-02-14 11:46:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 114 states have internal predecessors, (139), 49 states have call successors, (49), 8 states have call predecessors, (49), 8 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-14 11:46:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 236 transitions. [2023-02-14 11:46:10,496 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 236 transitions. Word has length 32 [2023-02-14 11:46:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:10,497 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 236 transitions. [2023-02-14 11:46:10,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 11:46:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 236 transitions. [2023-02-14 11:46:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:46:10,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:10,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:10,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:10,703 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 [2023-02-14 11:46:10,704 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2023-02-14 11:46:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630731854] [2023-02-14 11:46:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:10,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:10,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671193080] [2023-02-14 11:46:10,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:46:10,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:10,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:10,718 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) [2023-02-14 11:46:10,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 11:46:10,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:46:10,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 11:46:10,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:10,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:46:10,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:10,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630731854] [2023-02-14 11:46:10,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:10,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671193080] [2023-02-14 11:46:10,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671193080] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:46:10,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:46:10,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 11:46:10,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939908677] [2023-02-14 11:46:10,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:46:10,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:46:10,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:46:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:46:10,770 INFO L87 Difference]: Start difference. First operand 168 states and 236 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 11:46:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:10,873 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2023-02-14 11:46:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:46:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-02-14 11:46:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:10,876 INFO L225 Difference]: With dead ends: 214 [2023-02-14 11:46:10,876 INFO L226 Difference]: Without dead ends: 133 [2023-02-14 11:46:10,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:46:10,883 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:10,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:46:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-14 11:46:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2023-02-14 11:46:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 73 states have internal predecessors, (83), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-14 11:46:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 144 transitions. [2023-02-14 11:46:10,908 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 144 transitions. Word has length 32 [2023-02-14 11:46:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:10,908 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 144 transitions. [2023-02-14 11:46:10,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 11:46:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 144 transitions. [2023-02-14 11:46:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 11:46:10,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:10,910 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:10,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:11,115 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 [2023-02-14 11:46:11,115 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:11,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2023-02-14 11:46:11,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:11,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191219158] [2023-02-14 11:46:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:11,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:11,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776087102] [2023-02-14 11:46:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:11,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:11,125 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) [2023-02-14 11:46:11,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 11:46:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 11:46:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 11:46:11,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 11:46:11,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:11,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191219158] [2023-02-14 11:46:11,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:11,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776087102] [2023-02-14 11:46:11,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776087102] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:11,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:46:11,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-14 11:46:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475307275] [2023-02-14 11:46:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:46:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:46:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:46:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 11:46:11,388 INFO L87 Difference]: Start difference. First operand 110 states and 144 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 11:46:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:11,440 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2023-02-14 11:46:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:46:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-02-14 11:46:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:11,441 INFO L225 Difference]: With dead ends: 116 [2023-02-14 11:46:11,441 INFO L226 Difference]: Without dead ends: 114 [2023-02-14 11:46:11,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:46:11,442 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:11,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:46:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-14 11:46:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-02-14 11:46:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 states have internal predecessors, (86), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-14 11:46:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2023-02-14 11:46:11,460 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 37 [2023-02-14 11:46:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:11,460 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2023-02-14 11:46:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 11:46:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2023-02-14 11:46:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 11:46:11,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:11,465 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:11,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:11,669 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 [2023-02-14 11:46:11,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2023-02-14 11:46:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:11,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268815820] [2023-02-14 11:46:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:11,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:11,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:11,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507984807] [2023-02-14 11:46:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:11,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:11,692 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) [2023-02-14 11:46:11,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 11:46:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:11,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 11:46:11,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 11:46:12,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 11:46:13,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:13,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268815820] [2023-02-14 11:46:13,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:13,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507984807] [2023-02-14 11:46:13,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507984807] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:13,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:46:13,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-14 11:46:13,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223710762] [2023-02-14 11:46:13,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:13,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 11:46:13,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:13,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 11:46:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-14 11:46:13,046 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 11:46:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:23,498 INFO L93 Difference]: Finished difference Result 334 states and 463 transitions. [2023-02-14 11:46:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 11:46:23,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2023-02-14 11:46:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:23,500 INFO L225 Difference]: With dead ends: 334 [2023-02-14 11:46:23,500 INFO L226 Difference]: Without dead ends: 246 [2023-02-14 11:46:23,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 11:46:23,502 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 165 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:23,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 238 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-02-14 11:46:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-14 11:46:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2023-02-14 11:46:23,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 137 states have internal predecessors, (159), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-14 11:46:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 268 transitions. [2023-02-14 11:46:23,565 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 268 transitions. Word has length 49 [2023-02-14 11:46:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:23,565 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 268 transitions. [2023-02-14 11:46:23,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 11:46:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 268 transitions. [2023-02-14 11:46:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 11:46:23,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:23,566 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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] [2023-02-14 11:46:23,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 11:46:23,771 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 [2023-02-14 11:46:23,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2023-02-14 11:46:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:23,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898083081] [2023-02-14 11:46:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:23,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:23,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707086307] [2023-02-14 11:46:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:23,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:23,794 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) [2023-02-14 11:46:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 11:46:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 11:46:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 11:46:24,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-14 11:46:24,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:24,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898083081] [2023-02-14 11:46:24,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:24,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707086307] [2023-02-14 11:46:24,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707086307] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:24,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:46:24,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-14 11:46:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727866310] [2023-02-14 11:46:24,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:24,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 11:46:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:24,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 11:46:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:46:24,982 INFO L87 Difference]: Start difference. First operand 203 states and 268 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 11:47:01,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:47:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:47:26,804 INFO L93 Difference]: Finished difference Result 327 states and 457 transitions. [2023-02-14 11:47:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 11:47:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 57 [2023-02-14 11:47:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:47:26,806 INFO L225 Difference]: With dead ends: 327 [2023-02-14 11:47:26,806 INFO L226 Difference]: Without dead ends: 325 [2023-02-14 11:47:26,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=671, Invalid=2987, Unknown=2, NotChecked=0, Total=3660 [2023-02-14 11:47:26,807 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 155 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:47:26,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 384 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2023-02-14 11:47:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-14 11:47:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 211. [2023-02-14 11:47:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 143 states have internal predecessors, (165), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-14 11:47:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 274 transitions. [2023-02-14 11:47:26,866 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 274 transitions. Word has length 57 [2023-02-14 11:47:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:47:26,867 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 274 transitions. [2023-02-14 11:47:26,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 11:47:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 274 transitions. [2023-02-14 11:47:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 11:47:26,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:47:26,868 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:47:26,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 11:47:27,072 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 [2023-02-14 11:47:27,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:47:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:47:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2023-02-14 11:47:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:47:27,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606144996] [2023-02-14 11:47:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:27,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:47:27,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:47:27,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125573316] [2023-02-14 11:47:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:47:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:47:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:47:27,085 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) [2023-02-14 11:47:27,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 11:47:27,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:47:27,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:47:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 11:47:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:47:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 11:47:27,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:47:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:47:27,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606144996] [2023-02-14 11:47:27,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:47:27,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125573316] [2023-02-14 11:47:27,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125573316] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:47:27,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:47:27,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 11:47:27,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488694402] [2023-02-14 11:47:27,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:47:27,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:47:27,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:47:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:47:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:47:27,151 INFO L87 Difference]: Start difference. First operand 211 states and 274 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-14 11:47:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:47:27,255 INFO L93 Difference]: Finished difference Result 383 states and 514 transitions. [2023-02-14 11:47:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:47:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2023-02-14 11:47:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:47:27,257 INFO L225 Difference]: With dead ends: 383 [2023-02-14 11:47:27,257 INFO L226 Difference]: Without dead ends: 253 [2023-02-14 11:47:27,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:47:27,258 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:47:27,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:47:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-14 11:47:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 244. [2023-02-14 11:47:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 157 states have internal predecessors, (182), 73 states have call successors, (73), 15 states have call predecessors, (73), 15 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-14 11:47:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 327 transitions. [2023-02-14 11:47:27,333 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 327 transitions. Word has length 62 [2023-02-14 11:47:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:47:27,333 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 327 transitions. [2023-02-14 11:47:27,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-14 11:47:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 327 transitions. [2023-02-14 11:47:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 11:47:27,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:47:27,334 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 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] [2023-02-14 11:47:27,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 11:47:27,540 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 [2023-02-14 11:47:27,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:47:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:47:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2023-02-14 11:47:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:47:27,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026069404] [2023-02-14 11:47:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:27,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:47:27,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:47:27,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009413607] [2023-02-14 11:47:27,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:47:27,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:47:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:47:27,555 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) [2023-02-14 11:47:27,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 11:47:27,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:47:27,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:47:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 11:47:27,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:47:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:47:28,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:47:31,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:47:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026069404] [2023-02-14 11:47:31,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:47:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009413607] [2023-02-14 11:47:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009413607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:47:31,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:47:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-14 11:47:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881036200] [2023-02-14 11:47:31,234 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:47:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 11:47:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:47:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 11:47:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=279, Unknown=1, NotChecked=0, Total=342 [2023-02-14 11:47:31,235 INFO L87 Difference]: Start difference. First operand 244 states and 327 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 11:47:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:47:31,901 INFO L93 Difference]: Finished difference Result 334 states and 452 transitions. [2023-02-14 11:47:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 11:47:31,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 62 [2023-02-14 11:47:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:47:31,903 INFO L225 Difference]: With dead ends: 334 [2023-02-14 11:47:31,903 INFO L226 Difference]: Without dead ends: 332 [2023-02-14 11:47:31,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=117, Invalid=584, Unknown=1, NotChecked=0, Total=702 [2023-02-14 11:47:31,904 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 62 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:47:31,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 264 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 11:47:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-14 11:47:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 323. [2023-02-14 11:47:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 199 states have (on average 1.185929648241206) internal successors, (236), 200 states have internal predecessors, (236), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-02-14 11:47:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2023-02-14 11:47:32,009 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 62 [2023-02-14 11:47:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:47:32,009 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2023-02-14 11:47:32,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 11:47:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2023-02-14 11:47:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 11:47:32,010 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:47:32,011 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:47:32,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 11:47:32,219 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 [2023-02-14 11:47:32,219 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:47:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:47:32,219 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2023-02-14 11:47:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:47:32,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210097489] [2023-02-14 11:47:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:47:32,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:47:32,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016529944] [2023-02-14 11:47:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:32,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:47:32,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:47:32,233 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) [2023-02-14 11:47:32,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 11:47:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:47:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-14 11:47:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:47:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-14 11:47:32,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:47:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-14 11:47:41,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:47:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210097489] [2023-02-14 11:47:41,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:47:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016529944] [2023-02-14 11:47:41,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016529944] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:47:41,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:47:41,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2023-02-14 11:47:41,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667116951] [2023-02-14 11:47:41,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:47:41,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 11:47:41,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:47:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 11:47:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 11:47:41,408 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 35 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-14 11:47:55,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:48:16,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:48:31,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 10.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:48:47,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:48:59,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:49:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:49:06,330 INFO L93 Difference]: Finished difference Result 514 states and 721 transitions. [2023-02-14 11:49:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-14 11:49:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 76 [2023-02-14 11:49:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:49:06,334 INFO L225 Difference]: With dead ends: 514 [2023-02-14 11:49:06,334 INFO L226 Difference]: Without dead ends: 510 [2023-02-14 11:49:06,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3514 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=2058, Invalid=9932, Unknown=0, NotChecked=0, Total=11990 [2023-02-14 11:49:06,337 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 365 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 713 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 4006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.8s IncrementalHoareTripleChecker+Time [2023-02-14 11:49:06,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 594 Invalid, 4006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 3291 Invalid, 2 Unknown, 0 Unchecked, 43.8s Time] [2023-02-14 11:49:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-14 11:49:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 458. [2023-02-14 11:49:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 281 states have (on average 1.206405693950178) internal successors, (339), 282 states have internal predecessors, (339), 151 states have call successors, (151), 25 states have call predecessors, (151), 25 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-02-14 11:49:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 640 transitions. [2023-02-14 11:49:06,618 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 640 transitions. Word has length 76 [2023-02-14 11:49:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:49:06,618 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 640 transitions. [2023-02-14 11:49:06,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-14 11:49:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 640 transitions. [2023-02-14 11:49:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 11:49:06,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:49:06,619 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:49:06,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-14 11:49:06,825 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 [2023-02-14 11:49:06,825 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:49:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:49:06,826 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2023-02-14 11:49:06,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:49:06,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874157312] [2023-02-14 11:49:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:49:06,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:49:06,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:49:06,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106144466] [2023-02-14 11:49:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:49:06,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:49:06,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:49:06,837 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) [2023-02-14 11:49:06,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 11:49:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:49:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 11:49:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:49:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-14 11:49:07,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:49:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-14 11:49:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:49:07,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874157312] [2023-02-14 11:49:07,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:49:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106144466] [2023-02-14 11:49:07,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106144466] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:49:07,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:49:07,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-14 11:49:07,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709239105] [2023-02-14 11:49:07,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:49:07,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 11:49:07,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:49:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 11:49:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-14 11:49:07,776 INFO L87 Difference]: Start difference. First operand 458 states and 640 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-14 11:49:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:49:10,326 INFO L93 Difference]: Finished difference Result 975 states and 1492 transitions. [2023-02-14 11:49:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 11:49:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-02-14 11:49:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:49:10,330 INFO L225 Difference]: With dead ends: 975 [2023-02-14 11:49:10,330 INFO L226 Difference]: Without dead ends: 973 [2023-02-14 11:49:10,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 11:49:10,331 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 163 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 11:49:10,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 536 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 11:49:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2023-02-14 11:49:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 890. [2023-02-14 11:49:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 454 states have (on average 1.2951541850220265) internal successors, (588), 455 states have internal predecessors, (588), 407 states have call successors, (407), 28 states have call predecessors, (407), 28 states have return successors, (406), 406 states have call predecessors, (406), 406 states have call successors, (406) [2023-02-14 11:49:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1401 transitions. [2023-02-14 11:49:11,056 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1401 transitions. Word has length 79 [2023-02-14 11:49:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:49:11,056 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1401 transitions. [2023-02-14 11:49:11,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-14 11:49:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1401 transitions. [2023-02-14 11:49:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 11:49:11,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:49:11,057 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:49:11,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 11:49:11,262 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 [2023-02-14 11:49:11,262 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:49:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:49:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash -248462013, now seen corresponding path program 1 times [2023-02-14 11:49:11,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:49:11,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494904938] [2023-02-14 11:49:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:49:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:49:11,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:49:11,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772167694] [2023-02-14 11:49:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:49:11,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:49:11,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:49:11,270 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) [2023-02-14 11:49:11,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 11:49:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:49:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 11:49:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:49:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-14 11:49:11,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:49:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-14 11:49:13,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:49:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494904938] [2023-02-14 11:49:13,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:49:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772167694] [2023-02-14 11:49:13,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772167694] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:49:13,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:49:13,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-14 11:49:13,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656957287] [2023-02-14 11:49:13,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:49:13,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 11:49:13,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:49:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 11:49:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:49:13,149 INFO L87 Difference]: Start difference. First operand 890 states and 1401 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-14 11:49:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:49:45,747 INFO L93 Difference]: Finished difference Result 1289 states and 2039 transitions. [2023-02-14 11:49:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 11:49:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 79 [2023-02-14 11:49:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:49:45,752 INFO L225 Difference]: With dead ends: 1289 [2023-02-14 11:49:45,752 INFO L226 Difference]: Without dead ends: 1287 [2023-02-14 11:49:45,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=815, Invalid=3217, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 11:49:45,753 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 194 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:49:45,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 531 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2023-02-14 11:49:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2023-02-14 11:49:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1158. [2023-02-14 11:49:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 589 states have (on average 1.300509337860781) internal successors, (766), 590 states have internal predecessors, (766), 535 states have call successors, (535), 33 states have call predecessors, (535), 33 states have return successors, (534), 534 states have call predecessors, (534), 534 states have call successors, (534) [2023-02-14 11:49:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1835 transitions. [2023-02-14 11:49:46,786 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1835 transitions. Word has length 79 [2023-02-14 11:49:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:49:46,786 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1835 transitions. [2023-02-14 11:49:46,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-14 11:49:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1835 transitions. [2023-02-14 11:49:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-14 11:49:46,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:49:46,788 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:49:46,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-14 11:49:46,992 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 [2023-02-14 11:49:46,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:49:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:49:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2023-02-14 11:49:46,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:49:46,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147173789] [2023-02-14 11:49:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:49:46,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:49:46,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:49:46,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625391118] [2023-02-14 11:49:46,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:49:46,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:49:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:49:46,999 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) [2023-02-14 11:49:47,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 11:49:47,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:49:47,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:49:47,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 11:49:47,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:49:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 11:49:47,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:49:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 11:49:47,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:49:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147173789] [2023-02-14 11:49:47,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:49:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625391118] [2023-02-14 11:49:47,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625391118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:49:47,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:49:47,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-02-14 11:49:47,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711277939] [2023-02-14 11:49:47,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:49:47,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 11:49:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:49:47,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 11:49:47,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-14 11:49:47,183 INFO L87 Difference]: Start difference. First operand 1158 states and 1835 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-14 11:49:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:49:48,894 INFO L93 Difference]: Finished difference Result 1328 states and 2095 transitions. [2023-02-14 11:49:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 11:49:48,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2023-02-14 11:49:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:49:48,899 INFO L225 Difference]: With dead ends: 1328 [2023-02-14 11:49:48,899 INFO L226 Difference]: Without dead ends: 1321 [2023-02-14 11:49:48,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-02-14 11:49:48,900 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 77 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:49:48,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 344 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:49:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2023-02-14 11:49:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1127. [2023-02-14 11:49:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 566 states have (on average 1.3074204946996466) internal successors, (740), 567 states have internal predecessors, (740), 527 states have call successors, (527), 33 states have call predecessors, (527), 33 states have return successors, (526), 526 states have call predecessors, (526), 526 states have call successors, (526) [2023-02-14 11:49:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1793 transitions. [2023-02-14 11:49:49,943 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1793 transitions. Word has length 84 [2023-02-14 11:49:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:49:49,944 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1793 transitions. [2023-02-14 11:49:49,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-14 11:49:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1793 transitions. [2023-02-14 11:49:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 11:49:49,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:49:49,945 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:49:49,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-14 11:49:50,150 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 [2023-02-14 11:49:50,150 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:49:50,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:49:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash -437420468, now seen corresponding path program 4 times [2023-02-14 11:49:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:49:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546109245] [2023-02-14 11:49:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:49:50,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:49:50,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:49:50,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591980285] [2023-02-14 11:49:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:49:50,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:49:50,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:49:50,160 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) [2023-02-14 11:49:50,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 11:49:50,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:49:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:49:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-14 11:49:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:49:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 52 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-14 11:49:51,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:49:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 44 proven. 38 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-14 11:49:54,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:49:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546109245] [2023-02-14 11:49:54,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:49:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591980285] [2023-02-14 11:49:54,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591980285] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:49:54,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:49:54,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2023-02-14 11:49:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360905460] [2023-02-14 11:49:54,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:49:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 11:49:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:49:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 11:49:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 11:49:54,003 INFO L87 Difference]: Start difference. First operand 1127 states and 1793 transitions. Second operand has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 31 states have internal predecessors, (73), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-14 11:50:07,239 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 [] [2023-02-14 11:50:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:50:13,165 INFO L93 Difference]: Finished difference Result 1314 states and 2053 transitions. [2023-02-14 11:50:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 11:50:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 31 states have internal predecessors, (73), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 87 [2023-02-14 11:50:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:50:13,170 INFO L225 Difference]: With dead ends: 1314 [2023-02-14 11:50:13,170 INFO L226 Difference]: Without dead ends: 1312 [2023-02-14 11:50:13,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=764, Invalid=3396, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 11:50:13,172 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 269 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:50:13,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 376 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1666 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2023-02-14 11:50:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2023-02-14 11:50:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1289. [2023-02-14 11:50:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 659 states have (on average 1.291350531107739) internal successors, (851), 663 states have internal predecessors, (851), 589 states have call successors, (589), 40 states have call predecessors, (589), 40 states have return successors, (588), 585 states have call predecessors, (588), 588 states have call successors, (588) [2023-02-14 11:50:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 2028 transitions. [2023-02-14 11:50:14,403 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 2028 transitions. Word has length 87 [2023-02-14 11:50:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:50:14,404 INFO L495 AbstractCegarLoop]: Abstraction has 1289 states and 2028 transitions. [2023-02-14 11:50:14,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 31 states have internal predecessors, (73), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-14 11:50:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 2028 transitions. [2023-02-14 11:50:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-14 11:50:14,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:50:14,406 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:50:14,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 11:50:14,610 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 [2023-02-14 11:50:14,610 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:50:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:50:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2023-02-14 11:50:14,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:50:14,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330433789] [2023-02-14 11:50:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:50:14,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:50:14,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:50:14,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307113898] [2023-02-14 11:50:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:50:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:50:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:50:14,620 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) [2023-02-14 11:50:14,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 11:50:14,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:50:14,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:50:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-14 11:50:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:50:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 53 proven. 34 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-14 11:50:15,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:50:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-14 11:50:22,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:50:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330433789] [2023-02-14 11:50:22,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:50:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307113898] [2023-02-14 11:50:22,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307113898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:50:22,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:50:22,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-14 11:50:22,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134176372] [2023-02-14 11:50:22,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:50:22,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 11:50:22,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:50:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 11:50:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-02-14 11:50:22,471 INFO L87 Difference]: Start difference. First operand 1289 states and 2028 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-02-14 11:50:33,844 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 []