./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/theatreSquare.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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 16:12:26,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 16:12:26,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 16:12:26,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 16:12:26,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 16:12:26,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 16:12:26,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 16:12:26,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 16:12:26,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 16:12:26,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 16:12:26,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 16:12:26,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 16:12:26,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 16:12:26,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 16:12:26,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 16:12:26,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 16:12:26,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 16:12:26,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 16:12:26,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 16:12:26,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 16:12:26,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 16:12:26,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 16:12:26,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 16:12:26,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 16:12:26,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 16:12:26,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 16:12:26,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 16:12:26,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 16:12:26,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 16:12:26,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 16:12:26,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 16:12:26,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 16:12:26,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 16:12:26,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 16:12:26,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 16:12:26,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 16:12:26,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 16:12:26,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 16:12:26,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 16:12:26,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 16:12:26,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 16:12:26,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 16:12:26,706 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 16:12:26,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 16:12:26,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 16:12:26,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 16:12:26,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 16:12:26,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 16:12:26,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 16:12:26,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 16:12:26,710 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 16:12:26,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 16:12:26,710 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 16:12:26,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 16:12:26,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 16:12:26,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 16:12:26,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 16:12:26,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 16:12:26,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 16:12:26,711 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 16:12:26,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 16:12:26,712 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 16:12:26,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 16:12:26,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 16:12:26,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 16:12:26,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 16:12:26,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:12:26,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 16:12:26,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 16:12:26,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 16:12:26,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 16:12:26,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 16:12:26,714 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 16:12:26,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 16:12:26,714 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 16:12:26,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 16:12:26,715 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 16:12:26,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 [2023-02-18 16:12:26,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 16:12:26,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 16:12:26,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 16:12:26,953 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 16:12:26,953 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 16:12:26,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2023-02-18 16:12:27,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 16:12:28,060 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 16:12:28,060 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2023-02-18 16:12:28,066 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9c2f967/10905cbf55374efda114342abf0d2304/FLAG4fd630df1 [2023-02-18 16:12:28,081 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed9c2f967/10905cbf55374efda114342abf0d2304 [2023-02-18 16:12:28,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 16:12:28,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 16:12:28,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 16:12:28,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 16:12:28,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 16:12:28,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c4c62bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28, skipping insertion in model container [2023-02-18 16:12:28,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 16:12:28,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 16:12:28,192 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/loops-crafted-1/theatreSquare.c[370,383] [2023-02-18 16:12:28,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:12:28,210 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 16:12:28,217 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/loops-crafted-1/theatreSquare.c[370,383] [2023-02-18 16:12:28,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:12:28,238 INFO L208 MainTranslator]: Completed translation [2023-02-18 16:12:28,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28 WrapperNode [2023-02-18 16:12:28,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 16:12:28,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 16:12:28,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 16:12:28,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 16:12:28,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,268 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2023-02-18 16:12:28,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 16:12:28,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 16:12:28,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 16:12:28,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 16:12:28,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,287 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 16:12:28,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 16:12:28,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 16:12:28,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 16:12:28,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (1/1) ... [2023-02-18 16:12:28,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:12:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:28,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 16:12:28,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 16:12:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 16:12:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 16:12:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 16:12:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 16:12:28,391 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 16:12:28,392 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 16:12:28,574 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 16:12:28,580 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 16:12:28,580 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 16:12:28,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:12:28 BoogieIcfgContainer [2023-02-18 16:12:28,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 16:12:28,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 16:12:28,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 16:12:28,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 16:12:28,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:12:28" (1/3) ... [2023-02-18 16:12:28,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e8cd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:12:28, skipping insertion in model container [2023-02-18 16:12:28,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:12:28" (2/3) ... [2023-02-18 16:12:28,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e8cd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:12:28, skipping insertion in model container [2023-02-18 16:12:28,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:12:28" (3/3) ... [2023-02-18 16:12:28,597 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2023-02-18 16:12:28,633 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 16:12:28,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 16:12:28,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 16:12:28,681 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;@d57a5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 16:12:28,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 16:12:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 16:12:28,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:28,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 16:12:28,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2023-02-18 16:12:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:28,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815415018] [2023-02-18 16:12:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:28,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:12:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815415018] [2023-02-18 16:12:28,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815415018] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:28,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:28,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 16:12:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793288461] [2023-02-18 16:12:28,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:28,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:12:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:12:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:12:28,874 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:28,927 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2023-02-18 16:12:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 16:12:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 16:12:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:28,933 INFO L225 Difference]: With dead ends: 48 [2023-02-18 16:12:28,934 INFO L226 Difference]: Without dead ends: 19 [2023-02-18 16:12:28,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:12:28,938 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:28,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-18 16:12:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-18 16:12:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-18 16:12:28,958 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2023-02-18 16:12:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:28,959 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-18 16:12:28,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-18 16:12:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 16:12:28,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:28,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:28,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 16:12:28,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2023-02-18 16:12:28,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:28,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265367688] [2023-02-18 16:12:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:28,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:12:29,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265367688] [2023-02-18 16:12:29,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265367688] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:29,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 16:12:29,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546879543] [2023-02-18 16:12:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 16:12:29,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 16:12:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:12:29,131 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,215 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-02-18 16:12:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 16:12:29,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 16:12:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,217 INFO L225 Difference]: With dead ends: 39 [2023-02-18 16:12:29,217 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 16:12:29,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-18 16:12:29,219 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 133 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 16:12:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-02-18 16:12:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-02-18 16:12:29,228 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2023-02-18 16:12:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,229 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-02-18 16:12:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-02-18 16:12:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 16:12:29,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 16:12:29,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2023-02-18 16:12:29,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:29,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702244776] [2023-02-18 16:12:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:12:29,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702244776] [2023-02-18 16:12:29,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702244776] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:29,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 16:12:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100510820] [2023-02-18 16:12:29,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:12:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:12:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:12:29,297 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,309 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-02-18 16:12:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 16:12:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 16:12:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,310 INFO L225 Difference]: With dead ends: 47 [2023-02-18 16:12:29,310 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 16:12:29,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:12:29,313 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 16:12:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-02-18 16:12:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-02-18 16:12:29,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2023-02-18 16:12:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,326 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-02-18 16:12:29,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-02-18 16:12:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 16:12:29,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 16:12:29,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2023-02-18 16:12:29,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:29,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558514219] [2023-02-18 16:12:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:12:29,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558514219] [2023-02-18 16:12:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558514219] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 16:12:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625249961] [2023-02-18 16:12:29,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:12:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:12:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:12:29,394 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,413 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-02-18 16:12:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 16:12:29,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 16:12:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,415 INFO L225 Difference]: With dead ends: 66 [2023-02-18 16:12:29,415 INFO L226 Difference]: Without dead ends: 49 [2023-02-18 16:12:29,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:12:29,417 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 61 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-18 16:12:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2023-02-18 16:12:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-02-18 16:12:29,424 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2023-02-18 16:12:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,424 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-02-18 16:12:29,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-02-18 16:12:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 16:12:29,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 16:12:29,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2023-02-18 16:12:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:29,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683218840] [2023-02-18 16:12:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:29,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683218840] [2023-02-18 16:12:29,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683218840] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:29,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 16:12:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413099845] [2023-02-18 16:12:29,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 16:12:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 16:12:29,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 16:12:29,489 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,498 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2023-02-18 16:12:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 16:12:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 16:12:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,499 INFO L225 Difference]: With dead ends: 65 [2023-02-18 16:12:29,499 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 16:12:29,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 16:12:29,500 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 16:12:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-18 16:12:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2023-02-18 16:12:29,505 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2023-02-18 16:12:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,505 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2023-02-18 16:12:29,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2023-02-18 16:12:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 16:12:29,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 16:12:29,507 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:29,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2031253980, now seen corresponding path program 1 times [2023-02-18 16:12:29,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:29,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528749223] [2023-02-18 16:12:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 16:12:29,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528749223] [2023-02-18 16:12:29,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528749223] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:29,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 16:12:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317161418] [2023-02-18 16:12:29,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 16:12:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 16:12:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 16:12:29,559 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,568 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-02-18 16:12:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 16:12:29,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 16:12:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,571 INFO L225 Difference]: With dead ends: 51 [2023-02-18 16:12:29,572 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 16:12:29,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 16:12:29,574 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 16:12:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-18 16:12:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-18 16:12:29,587 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 21 [2023-02-18 16:12:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,588 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-18 16:12:29,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-18 16:12:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 16:12:29,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 16:12:29,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2023-02-18 16:12:29,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:29,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657159418] [2023-02-18 16:12:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 16:12:29,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657159418] [2023-02-18 16:12:29,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657159418] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:29,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 16:12:29,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7551257] [2023-02-18 16:12:29,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:12:29,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:12:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:12:29,644 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,664 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-02-18 16:12:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 16:12:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 16:12:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,665 INFO L225 Difference]: With dead ends: 48 [2023-02-18 16:12:29,665 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 16:12:29,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:12:29,667 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 16:12:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-18 16:12:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-02-18 16:12:29,677 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 21 [2023-02-18 16:12:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,678 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-02-18 16:12:29,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-02-18 16:12:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 16:12:29,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 16:12:29,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 336844510, now seen corresponding path program 1 times [2023-02-18 16:12:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108891363] [2023-02-18 16:12:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:29,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108891363] [2023-02-18 16:12:29,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108891363] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:12:29,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 16:12:29,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884222607] [2023-02-18 16:12:29,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:12:29,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:12:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:12:29,724 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,738 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-02-18 16:12:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 16:12:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 16:12:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,739 INFO L225 Difference]: With dead ends: 42 [2023-02-18 16:12:29,739 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 16:12:29,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:12:29,740 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 16:12:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-18 16:12:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-18 16:12:29,753 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 22 [2023-02-18 16:12:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,753 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-18 16:12:29,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-18 16:12:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 16:12:29,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 16:12:29,759 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:29,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2020008296, now seen corresponding path program 1 times [2023-02-18 16:12:29,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:29,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135521879] [2023-02-18 16:12:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:29,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:29,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135521879] [2023-02-18 16:12:29,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135521879] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:29,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513652360] [2023-02-18 16:12:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:29,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:29,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:29,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 16:12:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 16:12:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:29,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:12:29,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513652360] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:29,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:12:29,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-18 16:12:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98428638] [2023-02-18 16:12:29,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:12:29,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:12:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 16:12:29,905 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:29,914 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-02-18 16:12:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 16:12:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 16:12:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:29,914 INFO L225 Difference]: With dead ends: 39 [2023-02-18 16:12:29,914 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 16:12:29,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 16:12:29,916 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:29,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 42 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 16:12:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 16:12:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-18 16:12:29,924 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 23 [2023-02-18 16:12:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:29,925 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-18 16:12:29,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-18 16:12:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 16:12:29,927 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:29,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:29,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 16:12:30,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:30,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2023-02-18 16:12:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:30,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677304030] [2023-02-18 16:12:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:30,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677304030] [2023-02-18 16:12:30,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677304030] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:30,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059810393] [2023-02-18 16:12:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:30,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:30,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:30,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 16:12:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 16:12:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:30,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:12:30,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059810393] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:12:30,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:12:30,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-18 16:12:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66753105] [2023-02-18 16:12:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:12:30,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:12:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:12:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 16:12:30,245 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:30,259 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-02-18 16:12:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 16:12:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 16:12:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:30,260 INFO L225 Difference]: With dead ends: 31 [2023-02-18 16:12:30,260 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 16:12:30,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 16:12:30,261 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:30,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 40 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 16:12:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 16:12:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-18 16:12:30,267 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2023-02-18 16:12:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:30,268 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-18 16:12:30,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-18 16:12:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 16:12:30,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:30,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:30,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:30,473 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,SelfDestructingSolverStorable9 [2023-02-18 16:12:30,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:30,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2023-02-18 16:12:30,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:30,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193730880] [2023-02-18 16:12:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:30,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:30,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193730880] [2023-02-18 16:12:30,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193730880] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268173631] [2023-02-18 16:12:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:30,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:30,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:30,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:30,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 16:12:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:30,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 16:12:30,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:30,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268173631] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:30,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:30,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-02-18 16:12:30,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967200485] [2023-02-18 16:12:30,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 16:12:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 16:12:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-02-18 16:12:30,849 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:31,093 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2023-02-18 16:12:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 16:12:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 16:12:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:31,094 INFO L225 Difference]: With dead ends: 77 [2023-02-18 16:12:31,094 INFO L226 Difference]: Without dead ends: 71 [2023-02-18 16:12:31,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 16:12:31,095 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 140 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:31,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 274 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-18 16:12:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2023-02-18 16:12:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-02-18 16:12:31,104 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2023-02-18 16:12:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:31,104 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-02-18 16:12:31,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-02-18 16:12:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 16:12:31,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:31,104 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:31,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:31,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:31,317 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:31,318 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2023-02-18 16:12:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699891812] [2023-02-18 16:12:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:31,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699891812] [2023-02-18 16:12:31,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699891812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781494914] [2023-02-18 16:12:31,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:12:31,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:31,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:31,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:31,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 16:12:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:12:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:31,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:31,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781494914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:31,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:31,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 16:12:31,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458114430] [2023-02-18 16:12:31,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 16:12:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 16:12:31,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:12:31,529 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:31,573 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2023-02-18 16:12:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 16:12:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 16:12:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:31,574 INFO L225 Difference]: With dead ends: 63 [2023-02-18 16:12:31,574 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 16:12:31,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:12:31,574 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 90 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:31,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 139 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:31,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 16:12:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2023-02-18 16:12:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-18 16:12:31,581 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2023-02-18 16:12:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:31,582 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-18 16:12:31,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-18 16:12:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 16:12:31,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:31,582 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:31,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 16:12:31,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:31,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:31,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2023-02-18 16:12:31,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:31,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201122447] [2023-02-18 16:12:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:31,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:31,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201122447] [2023-02-18 16:12:31,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201122447] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:31,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813037558] [2023-02-18 16:12:31,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:12:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:31,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:31,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 16:12:31,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 16:12:31,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:31,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 16:12:31,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:31,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813037558] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:31,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:31,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-18 16:12:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470254425] [2023-02-18 16:12:31,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:31,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 16:12:31,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 16:12:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 16:12:31,935 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:31,953 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-02-18 16:12:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 16:12:31,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 16:12:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:31,954 INFO L225 Difference]: With dead ends: 72 [2023-02-18 16:12:31,954 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 16:12:31,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 16:12:31,955 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:31,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 102 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 16:12:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-02-18 16:12:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2023-02-18 16:12:31,962 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2023-02-18 16:12:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:31,962 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2023-02-18 16:12:31,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2023-02-18 16:12:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 16:12:31,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:31,963 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:31,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:32,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 16:12:32,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2023-02-18 16:12:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:32,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629943695] [2023-02-18 16:12:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:32,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:32,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629943695] [2023-02-18 16:12:32,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629943695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482021511] [2023-02-18 16:12:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:12:32,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:32,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:32,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 16:12:32,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:12:32,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:32,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 16:12:32,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:32,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482021511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:32,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:32,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-18 16:12:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486360198] [2023-02-18 16:12:32,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:32,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 16:12:32,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 16:12:32,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 16:12:32,288 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:32,309 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2023-02-18 16:12:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 16:12:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 16:12:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:32,310 INFO L225 Difference]: With dead ends: 126 [2023-02-18 16:12:32,310 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 16:12:32,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 16:12:32,310 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:32,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 124 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 16:12:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2023-02-18 16:12:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-02-18 16:12:32,317 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2023-02-18 16:12:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:32,318 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-02-18 16:12:32,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-02-18 16:12:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 16:12:32,318 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:32,318 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:32,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:32,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:32,529 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2023-02-18 16:12:32,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:32,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695571795] [2023-02-18 16:12:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:32,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695571795] [2023-02-18 16:12:32,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695571795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926034357] [2023-02-18 16:12:32,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:12:32,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:32,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:32,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 16:12:32,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:32,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:12:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:32,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:32,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926034357] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:32,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:32,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 16:12:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667983762] [2023-02-18 16:12:32,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:32,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 16:12:32,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 16:12:32,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:12:32,678 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:32,742 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-02-18 16:12:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 16:12:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 16:12:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:32,742 INFO L225 Difference]: With dead ends: 90 [2023-02-18 16:12:32,742 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 16:12:32,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-02-18 16:12:32,743 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 103 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:32,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 195 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 16:12:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2023-02-18 16:12:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2023-02-18 16:12:32,750 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2023-02-18 16:12:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:32,750 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2023-02-18 16:12:32,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2023-02-18 16:12:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 16:12:32,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:32,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:32,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:32,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:32,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2023-02-18 16:12:32,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:32,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329179662] [2023-02-18 16:12:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:32,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:33,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:33,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329179662] [2023-02-18 16:12:33,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329179662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:33,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93750498] [2023-02-18 16:12:33,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:12:33,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:33,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:33,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:33,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 16:12:33,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-02-18 16:12:33,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:12:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:33,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93750498] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:33,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 16:12:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970675456] [2023-02-18 16:12:33,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:33,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 16:12:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 16:12:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:12:33,109 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:33,176 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2023-02-18 16:12:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 16:12:33,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 16:12:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:33,177 INFO L225 Difference]: With dead ends: 104 [2023-02-18 16:12:33,177 INFO L226 Difference]: Without dead ends: 79 [2023-02-18 16:12:33,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:12:33,178 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:33,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 184 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-18 16:12:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2023-02-18 16:12:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2023-02-18 16:12:33,186 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2023-02-18 16:12:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:33,186 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2023-02-18 16:12:33,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2023-02-18 16:12:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 16:12:33,186 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:33,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:33,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 16:12:33,393 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,SelfDestructingSolverStorable15 [2023-02-18 16:12:33,394 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:33,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2023-02-18 16:12:33,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:33,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502105929] [2023-02-18 16:12:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:33,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:33,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:33,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502105929] [2023-02-18 16:12:33,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502105929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:33,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186693560] [2023-02-18 16:12:33,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:12:33,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:33,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:33,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:33,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 16:12:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 16:12:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:33,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:33,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186693560] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:33,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:33,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 26 [2023-02-18 16:12:33,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046487126] [2023-02-18 16:12:33,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:33,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:12:33,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:12:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2023-02-18 16:12:33,772 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:34,044 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2023-02-18 16:12:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 16:12:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 16:12:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:34,045 INFO L225 Difference]: With dead ends: 159 [2023-02-18 16:12:34,045 INFO L226 Difference]: Without dead ends: 150 [2023-02-18 16:12:34,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 16:12:34,046 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 150 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:34,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 603 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-18 16:12:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2023-02-18 16:12:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2023-02-18 16:12:34,056 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2023-02-18 16:12:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:34,057 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2023-02-18 16:12:34,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2023-02-18 16:12:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 16:12:34,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:34,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:34,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:34,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 16:12:34,262 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:34,262 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2023-02-18 16:12:34,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:34,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800855439] [2023-02-18 16:12:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:34,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:34,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800855439] [2023-02-18 16:12:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800855439] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539028529] [2023-02-18 16:12:34,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:12:34,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:34,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:34,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:34,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 16:12:34,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:34,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:12:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:34,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539028529] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:34,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:34,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 16:12:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345757079] [2023-02-18 16:12:34,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:34,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 16:12:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 16:12:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:12:34,416 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:34,471 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2023-02-18 16:12:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 16:12:34,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 16:12:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:34,471 INFO L225 Difference]: With dead ends: 107 [2023-02-18 16:12:34,471 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 16:12:34,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-02-18 16:12:34,472 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 146 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 212 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 16:12:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2023-02-18 16:12:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2023-02-18 16:12:34,482 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2023-02-18 16:12:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:34,482 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2023-02-18 16:12:34,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2023-02-18 16:12:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:12:34,483 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:34,483 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:34,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:34,687 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,SelfDestructingSolverStorable17 [2023-02-18 16:12:34,688 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2023-02-18 16:12:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:34,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878233316] [2023-02-18 16:12:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:34,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:34,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878233316] [2023-02-18 16:12:34,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878233316] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:34,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690566129] [2023-02-18 16:12:34,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:12:34,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:34,759 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:34,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 16:12:34,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 16:12:34,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 16:12:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:34,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:34,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690566129] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:34,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:34,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-02-18 16:12:34,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224989388] [2023-02-18 16:12:34,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:34,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 16:12:34,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 16:12:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:12:34,938 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:35,062 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2023-02-18 16:12:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 16:12:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 16:12:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:35,063 INFO L225 Difference]: With dead ends: 131 [2023-02-18 16:12:35,063 INFO L226 Difference]: Without dead ends: 107 [2023-02-18 16:12:35,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:12:35,064 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 189 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:35,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 313 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-18 16:12:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2023-02-18 16:12:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2023-02-18 16:12:35,075 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2023-02-18 16:12:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:35,075 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2023-02-18 16:12:35,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2023-02-18 16:12:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:12:35,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:35,076 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:35,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:35,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:35,285 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2023-02-18 16:12:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:35,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905899664] [2023-02-18 16:12:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:35,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905899664] [2023-02-18 16:12:35,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905899664] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:35,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860998402] [2023-02-18 16:12:35,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:12:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:35,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:35,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:35,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 16:12:35,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:12:35,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:35,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 16:12:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:35,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:35,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860998402] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:35,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:35,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-02-18 16:12:35,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877343158] [2023-02-18 16:12:35,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:35,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 16:12:35,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:35,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 16:12:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:12:35,504 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:35,642 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2023-02-18 16:12:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 16:12:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 16:12:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:35,645 INFO L225 Difference]: With dead ends: 121 [2023-02-18 16:12:35,645 INFO L226 Difference]: Without dead ends: 109 [2023-02-18 16:12:35,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:12:35,646 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 191 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:35,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 567 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-18 16:12:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2023-02-18 16:12:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2023-02-18 16:12:35,657 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2023-02-18 16:12:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:35,657 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2023-02-18 16:12:35,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2023-02-18 16:12:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:12:35,658 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:35,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:35,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:35,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:35,863 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2023-02-18 16:12:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:35,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740552446] [2023-02-18 16:12:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:35,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:35,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740552446] [2023-02-18 16:12:35,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740552446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269202856] [2023-02-18 16:12:35,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:12:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:35,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:35,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 16:12:35,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:35,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:35,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 16:12:35,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:35,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:35,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269202856] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:35,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:35,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 16:12:35,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026049263] [2023-02-18 16:12:35,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:35,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 16:12:35,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 16:12:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:12:35,980 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:36,018 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2023-02-18 16:12:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 16:12:36,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 16:12:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:36,019 INFO L225 Difference]: With dead ends: 110 [2023-02-18 16:12:36,019 INFO L226 Difference]: Without dead ends: 77 [2023-02-18 16:12:36,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-02-18 16:12:36,020 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:36,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 165 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-18 16:12:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2023-02-18 16:12:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2023-02-18 16:12:36,031 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2023-02-18 16:12:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:36,031 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2023-02-18 16:12:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2023-02-18 16:12:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:12:36,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:36,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:36,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:36,238 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,SelfDestructingSolverStorable20 [2023-02-18 16:12:36,238 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2023-02-18 16:12:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:36,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605567226] [2023-02-18 16:12:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:36,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:36,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605567226] [2023-02-18 16:12:36,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605567226] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:36,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183275648] [2023-02-18 16:12:36,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:12:36,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:36,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:36,269 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:36,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 16:12:36,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-02-18 16:12:36,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:36,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 16:12:36,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:36,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:36,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183275648] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:36,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:36,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 16:12:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868290164] [2023-02-18 16:12:36,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 16:12:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 16:12:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:12:36,338 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:36,366 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2023-02-18 16:12:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 16:12:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 16:12:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:36,368 INFO L225 Difference]: With dead ends: 84 [2023-02-18 16:12:36,368 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 16:12:36,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-02-18 16:12:36,369 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:36,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 146 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 16:12:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-02-18 16:12:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-18 16:12:36,379 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2023-02-18 16:12:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:36,379 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-18 16:12:36,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-18 16:12:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 16:12:36,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:36,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:36,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:36,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:36,586 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:36,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2023-02-18 16:12:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:36,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542576529] [2023-02-18 16:12:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:36,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:36,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542576529] [2023-02-18 16:12:36,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542576529] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:36,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015747832] [2023-02-18 16:12:36,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:12:36,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:36,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:36,746 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:36,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 16:12:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:36,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 16:12:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:36,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:37,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015747832] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:37,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:37,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 29 [2023-02-18 16:12:37,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022023234] [2023-02-18 16:12:37,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:37,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:12:37,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:12:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:12:37,075 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:37,489 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2023-02-18 16:12:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:12:37,489 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 16:12:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:37,490 INFO L225 Difference]: With dead ends: 149 [2023-02-18 16:12:37,490 INFO L226 Difference]: Without dead ends: 140 [2023-02-18 16:12:37,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 16:12:37,491 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 165 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:37,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 897 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:12:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-18 16:12:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2023-02-18 16:12:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2023-02-18 16:12:37,507 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2023-02-18 16:12:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:37,508 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2023-02-18 16:12:37,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2023-02-18 16:12:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 16:12:37,508 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:37,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:37,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:37,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:37,713 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2023-02-18 16:12:37,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:37,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055006338] [2023-02-18 16:12:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:37,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:37,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055006338] [2023-02-18 16:12:37,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055006338] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586171810] [2023-02-18 16:12:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:12:37,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:37,869 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:37,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 16:12:37,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:37,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 16:12:37,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:38,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:38,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586171810] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:38,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:38,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2023-02-18 16:12:38,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778353608] [2023-02-18 16:12:38,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:38,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 16:12:38,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 16:12:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:12:38,137 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:38,411 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2023-02-18 16:12:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 16:12:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 16:12:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:38,412 INFO L225 Difference]: With dead ends: 118 [2023-02-18 16:12:38,412 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 16:12:38,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 16:12:38,412 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 118 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:38,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 426 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 16:12:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2023-02-18 16:12:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2023-02-18 16:12:38,426 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2023-02-18 16:12:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:38,426 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2023-02-18 16:12:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2023-02-18 16:12:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 16:12:38,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:38,427 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:38,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:38,628 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,SelfDestructingSolverStorable23 [2023-02-18 16:12:38,628 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2023-02-18 16:12:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:38,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332037110] [2023-02-18 16:12:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:38,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:38,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332037110] [2023-02-18 16:12:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332037110] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119634532] [2023-02-18 16:12:38,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:12:38,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:38,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:38,706 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:38,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 16:12:38,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 16:12:38,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:38,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:12:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:38,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:38,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119634532] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:38,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:38,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-02-18 16:12:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995192193] [2023-02-18 16:12:38,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:38,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:12:38,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:12:38,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:12:38,935 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:39,166 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2023-02-18 16:12:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 16:12:39,166 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 16:12:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:39,167 INFO L225 Difference]: With dead ends: 155 [2023-02-18 16:12:39,167 INFO L226 Difference]: Without dead ends: 129 [2023-02-18 16:12:39,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 16:12:39,168 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 367 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:39,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 452 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-18 16:12:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2023-02-18 16:12:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2023-02-18 16:12:39,193 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2023-02-18 16:12:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:39,193 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2023-02-18 16:12:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2023-02-18 16:12:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 16:12:39,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:39,194 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:39,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:39,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:39,403 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2023-02-18 16:12:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:39,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168986740] [2023-02-18 16:12:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:39,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:39,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:39,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168986740] [2023-02-18 16:12:39,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168986740] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:39,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857091822] [2023-02-18 16:12:39,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:12:39,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:39,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:39,477 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:39,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 16:12:39,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:12:39,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:12:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:39,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:39,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857091822] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:39,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:39,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-02-18 16:12:39,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056270397] [2023-02-18 16:12:39,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:39,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:12:39,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:12:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:12:39,697 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:39,913 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2023-02-18 16:12:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 16:12:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 16:12:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:39,919 INFO L225 Difference]: With dead ends: 144 [2023-02-18 16:12:39,919 INFO L226 Difference]: Without dead ends: 131 [2023-02-18 16:12:39,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 16:12:39,921 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 374 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:39,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 770 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-18 16:12:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2023-02-18 16:12:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2023-02-18 16:12:39,955 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2023-02-18 16:12:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:39,956 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2023-02-18 16:12:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2023-02-18 16:12:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 16:12:39,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:39,956 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:39,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:40,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:40,161 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2023-02-18 16:12:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:40,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273975762] [2023-02-18 16:12:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:40,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273975762] [2023-02-18 16:12:40,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273975762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290939467] [2023-02-18 16:12:40,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:12:40,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:40,194 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:40,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 16:12:40,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 16:12:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 16:12:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:40,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:40,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290939467] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:40,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:40,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-18 16:12:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521739063] [2023-02-18 16:12:40,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 16:12:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 16:12:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:12:40,277 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:40,322 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2023-02-18 16:12:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 16:12:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 16:12:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:40,323 INFO L225 Difference]: With dead ends: 139 [2023-02-18 16:12:40,323 INFO L226 Difference]: Without dead ends: 126 [2023-02-18 16:12:40,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-02-18 16:12:40,323 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:40,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 145 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-18 16:12:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2023-02-18 16:12:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 111 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2023-02-18 16:12:40,344 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2023-02-18 16:12:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:40,345 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2023-02-18 16:12:40,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2023-02-18 16:12:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 16:12:40,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:40,345 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:40,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:40,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:40,550 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:40,550 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2023-02-18 16:12:40,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:40,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675099276] [2023-02-18 16:12:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:40,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:40,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:40,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675099276] [2023-02-18 16:12:40,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675099276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441687221] [2023-02-18 16:12:40,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:12:40,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:40,593 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:40,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 16:12:40,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 16:12:40,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 16:12:40,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:40,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:12:40,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441687221] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:40,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:40,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-18 16:12:40,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975695291] [2023-02-18 16:12:40,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:40,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 16:12:40,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:40,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 16:12:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:12:40,682 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:40,760 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2023-02-18 16:12:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 16:12:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 16:12:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:40,761 INFO L225 Difference]: With dead ends: 262 [2023-02-18 16:12:40,761 INFO L226 Difference]: Without dead ends: 202 [2023-02-18 16:12:40,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-02-18 16:12:40,762 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 131 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:40,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 190 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-18 16:12:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2023-02-18 16:12:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 133 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2023-02-18 16:12:40,790 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2023-02-18 16:12:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:40,790 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2023-02-18 16:12:40,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2023-02-18 16:12:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 16:12:40,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:40,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:40,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 16:12:41,005 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2023-02-18 16:12:41,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:41,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671315867] [2023-02-18 16:12:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:41,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:41,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671315867] [2023-02-18 16:12:41,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671315867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453459759] [2023-02-18 16:12:41,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:12:41,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:41,205 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:41,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 16:12:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 16:12:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:41,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:41,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453459759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:41,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:41,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 32 [2023-02-18 16:12:41,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669569897] [2023-02-18 16:12:41,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:41,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 16:12:41,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 16:12:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2023-02-18 16:12:41,602 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:42,109 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2023-02-18 16:12:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:12:42,109 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 16:12:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:42,110 INFO L225 Difference]: With dead ends: 258 [2023-02-18 16:12:42,110 INFO L226 Difference]: Without dead ends: 249 [2023-02-18 16:12:42,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 16 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=2305, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:12:42,111 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 200 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:42,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1151 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:12:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-18 16:12:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2023-02-18 16:12:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2023-02-18 16:12:42,149 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2023-02-18 16:12:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:42,149 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2023-02-18 16:12:42,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2023-02-18 16:12:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 16:12:42,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:42,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:42,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:42,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 16:12:42,350 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2023-02-18 16:12:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:42,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707395800] [2023-02-18 16:12:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 16:12:42,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707395800] [2023-02-18 16:12:42,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707395800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680429341] [2023-02-18 16:12:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:12:42,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:42,412 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:42,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 16:12:42,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 16:12:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 16:12:42,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 16:12:42,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680429341] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:42,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:42,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-02-18 16:12:42,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578954562] [2023-02-18 16:12:42,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:42,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 16:12:42,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:42,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 16:12:42,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:12:42,574 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:42,739 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2023-02-18 16:12:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 16:12:42,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 16:12:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:42,739 INFO L225 Difference]: With dead ends: 217 [2023-02-18 16:12:42,739 INFO L226 Difference]: Without dead ends: 181 [2023-02-18 16:12:42,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:12:42,740 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 276 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:42,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 299 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-18 16:12:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2023-02-18 16:12:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.196078431372549) internal successors, (183), 153 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2023-02-18 16:12:42,770 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2023-02-18 16:12:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:42,770 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2023-02-18 16:12:42,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2023-02-18 16:12:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 16:12:42,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:42,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:42,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-18 16:12:42,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:42,973 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2023-02-18 16:12:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:42,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26435505] [2023-02-18 16:12:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:43,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26435505] [2023-02-18 16:12:43,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26435505] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:43,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895965631] [2023-02-18 16:12:43,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:12:43,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:43,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:43,147 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:43,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 16:12:43,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 16:12:43,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:43,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 16:12:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:43,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:43,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895965631] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:43,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:43,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-02-18 16:12:43,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812153218] [2023-02-18 16:12:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:43,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 16:12:43,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 16:12:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2023-02-18 16:12:43,491 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:43,927 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2023-02-18 16:12:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 16:12:43,927 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 16:12:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:43,928 INFO L225 Difference]: With dead ends: 226 [2023-02-18 16:12:43,928 INFO L226 Difference]: Without dead ends: 204 [2023-02-18 16:12:43,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 16:12:43,929 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 131 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:43,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 799 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:12:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-18 16:12:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2023-02-18 16:12:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2023-02-18 16:12:43,961 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2023-02-18 16:12:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:43,962 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2023-02-18 16:12:43,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2023-02-18 16:12:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 16:12:43,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:43,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:43,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:44,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:44,169 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2023-02-18 16:12:44,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:44,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774514111] [2023-02-18 16:12:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:44,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 16:12:44,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:44,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774514111] [2023-02-18 16:12:44,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774514111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:44,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824326795] [2023-02-18 16:12:44,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:12:44,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:44,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:44,233 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:44,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 16:12:44,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:12:44,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:44,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 16:12:44,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 16:12:44,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 16:12:44,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824326795] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:44,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:44,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-02-18 16:12:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424153296] [2023-02-18 16:12:44,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:44,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 16:12:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 16:12:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:12:44,407 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:44,581 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2023-02-18 16:12:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 16:12:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 16:12:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:44,583 INFO L225 Difference]: With dead ends: 186 [2023-02-18 16:12:44,583 INFO L226 Difference]: Without dead ends: 167 [2023-02-18 16:12:44,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:12:44,584 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 233 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:44,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 509 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-18 16:12:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2023-02-18 16:12:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 152 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2023-02-18 16:12:44,625 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2023-02-18 16:12:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:44,625 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2023-02-18 16:12:44,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2023-02-18 16:12:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 16:12:44,627 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:44,627 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:44,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:44,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:44,829 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2023-02-18 16:12:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:44,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092196584] [2023-02-18 16:12:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:44,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:44,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:44,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092196584] [2023-02-18 16:12:44,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092196584] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:44,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099991752] [2023-02-18 16:12:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:12:44,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:44,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:44,935 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:44,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 16:12:44,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 16:12:44,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 16:12:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:45,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:45,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099991752] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:45,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:45,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-02-18 16:12:45,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241003000] [2023-02-18 16:12:45,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:45,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:12:45,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:12:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:12:45,259 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:45,659 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2023-02-18 16:12:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:12:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 16:12:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:45,668 INFO L225 Difference]: With dead ends: 263 [2023-02-18 16:12:45,668 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 16:12:45,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=619, Invalid=2243, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:12:45,669 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 629 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:45,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 569 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 16:12:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2023-02-18 16:12:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2023-02-18 16:12:45,709 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2023-02-18 16:12:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:45,710 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2023-02-18 16:12:45,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2023-02-18 16:12:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 16:12:45,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:45,710 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:45,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-18 16:12:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-18 16:12:45,911 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2023-02-18 16:12:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:45,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349392719] [2023-02-18 16:12:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:46,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:46,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349392719] [2023-02-18 16:12:46,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349392719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:46,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007304573] [2023-02-18 16:12:46,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:12:46,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:46,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:46,053 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:46,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 16:12:46,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:12:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 16:12:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:46,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:46,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007304573] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:46,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:46,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-02-18 16:12:46,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527160510] [2023-02-18 16:12:46,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:46,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:12:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:12:46,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:12:46,372 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:46,731 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2023-02-18 16:12:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 16:12:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 16:12:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:46,734 INFO L225 Difference]: With dead ends: 251 [2023-02-18 16:12:46,734 INFO L226 Difference]: Without dead ends: 236 [2023-02-18 16:12:46,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 16:12:46,735 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 412 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:46,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 1251 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:12:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-02-18 16:12:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2023-02-18 16:12:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2023-02-18 16:12:46,777 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2023-02-18 16:12:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:46,777 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2023-02-18 16:12:46,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2023-02-18 16:12:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 16:12:46,778 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:46,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:46,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-18 16:12:46,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-18 16:12:46,981 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:46,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2023-02-18 16:12:46,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:46,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017860577] [2023-02-18 16:12:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:46,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:47,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:47,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017860577] [2023-02-18 16:12:47,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017860577] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:47,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278208925] [2023-02-18 16:12:47,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:12:47,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:47,027 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:47,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 16:12:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 16:12:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:47,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278208925] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:47,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:47,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-18 16:12:47,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697377650] [2023-02-18 16:12:47,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:47,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 16:12:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:47,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 16:12:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-18 16:12:47,112 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:47,188 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2023-02-18 16:12:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 16:12:47,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 16:12:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:47,189 INFO L225 Difference]: With dead ends: 227 [2023-02-18 16:12:47,189 INFO L226 Difference]: Without dead ends: 171 [2023-02-18 16:12:47,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:12:47,190 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:47,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 174 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-18 16:12:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2023-02-18 16:12:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 156 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2023-02-18 16:12:47,228 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2023-02-18 16:12:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:47,229 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2023-02-18 16:12:47,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2023-02-18 16:12:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 16:12:47,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:47,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:47,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:47,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-18 16:12:47,430 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2023-02-18 16:12:47,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:47,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395188058] [2023-02-18 16:12:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395188058] [2023-02-18 16:12:47,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395188058] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519882988] [2023-02-18 16:12:47,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:12:47,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:47,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:47,472 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:47,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 16:12:47,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:47,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:47,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 16:12:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:47,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:47,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519882988] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:47,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:47,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-18 16:12:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216294998] [2023-02-18 16:12:47,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 16:12:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 16:12:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-18 16:12:47,559 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:47,628 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2023-02-18 16:12:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 16:12:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 16:12:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:47,629 INFO L225 Difference]: With dead ends: 178 [2023-02-18 16:12:47,629 INFO L226 Difference]: Without dead ends: 172 [2023-02-18 16:12:47,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:12:47,630 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:47,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 149 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-18 16:12:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2023-02-18 16:12:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2023-02-18 16:12:47,667 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2023-02-18 16:12:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:47,667 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2023-02-18 16:12:47,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2023-02-18 16:12:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 16:12:47,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:47,668 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:47,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:47,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:47,868 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2023-02-18 16:12:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:47,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275774400] [2023-02-18 16:12:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:48,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275774400] [2023-02-18 16:12:48,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275774400] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227841846] [2023-02-18 16:12:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:12:48,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:48,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:48,084 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:48,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 16:12:48,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 16:12:48,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 16:12:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:48,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:48,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227841846] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:48,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:48,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2023-02-18 16:12:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386315847] [2023-02-18 16:12:48,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 16:12:48,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 16:12:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 16:12:48,474 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:49,074 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2023-02-18 16:12:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:12:49,079 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 16:12:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:49,079 INFO L225 Difference]: With dead ends: 305 [2023-02-18 16:12:49,079 INFO L226 Difference]: Without dead ends: 296 [2023-02-18 16:12:49,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 20 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=2816, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 16:12:49,081 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 223 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:49,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1849 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:12:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-02-18 16:12:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2023-02-18 16:12:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2023-02-18 16:12:49,124 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2023-02-18 16:12:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:49,124 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2023-02-18 16:12:49,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2023-02-18 16:12:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 16:12:49,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:49,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:49,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-18 16:12:49,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-18 16:12:49,327 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:49,327 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2023-02-18 16:12:49,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:49,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24248899] [2023-02-18 16:12:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:49,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24248899] [2023-02-18 16:12:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24248899] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339665997] [2023-02-18 16:12:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:12:49,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:49,510 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:49,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 16:12:49,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:12:49,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 16:12:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:49,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:49,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339665997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:49,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:49,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2023-02-18 16:12:49,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303099098] [2023-02-18 16:12:49,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 16:12:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 16:12:49,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 16:12:49,871 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:50,374 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2023-02-18 16:12:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 16:12:50,375 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 16:12:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:50,375 INFO L225 Difference]: With dead ends: 223 [2023-02-18 16:12:50,375 INFO L226 Difference]: Without dead ends: 200 [2023-02-18 16:12:50,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 16 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:12:50,376 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:50,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1193 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:12:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-18 16:12:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2023-02-18 16:12:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2023-02-18 16:12:50,414 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2023-02-18 16:12:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:50,415 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2023-02-18 16:12:50,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2023-02-18 16:12:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 16:12:50,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:50,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:50,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:50,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-18 16:12:50,616 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2023-02-18 16:12:50,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:50,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015385881] [2023-02-18 16:12:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:12:50,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015385881] [2023-02-18 16:12:50,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015385881] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645691192] [2023-02-18 16:12:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:12:50,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:50,761 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:50,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 16:12:50,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 16:12:50,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 16:12:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:12:50,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:12:51,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645691192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:51,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:51,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2023-02-18 16:12:51,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931241467] [2023-02-18 16:12:51,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:51,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 16:12:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:51,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 16:12:51,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2023-02-18 16:12:51,062 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:51,373 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2023-02-18 16:12:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 16:12:51,373 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 16:12:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:51,374 INFO L225 Difference]: With dead ends: 198 [2023-02-18 16:12:51,374 INFO L226 Difference]: Without dead ends: 192 [2023-02-18 16:12:51,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:12:51,374 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:51,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 436 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-18 16:12:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2023-02-18 16:12:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2023-02-18 16:12:51,417 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2023-02-18 16:12:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:51,417 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2023-02-18 16:12:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2023-02-18 16:12:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 16:12:51,418 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:51,418 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:51,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:51,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-18 16:12:51,625 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2023-02-18 16:12:51,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:51,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898421627] [2023-02-18 16:12:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:51,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898421627] [2023-02-18 16:12:51,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898421627] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085972655] [2023-02-18 16:12:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:12:51,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:51,749 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:51,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 16:12:51,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:12:51,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:51,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 16:12:51,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:52,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:52,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085972655] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:52,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:52,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-02-18 16:12:52,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356789376] [2023-02-18 16:12:52,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:52,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:12:52,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:12:52,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:12:52,192 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:52,846 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2023-02-18 16:12:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:12:52,847 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 16:12:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:52,848 INFO L225 Difference]: With dead ends: 299 [2023-02-18 16:12:52,848 INFO L226 Difference]: Without dead ends: 267 [2023-02-18 16:12:52,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=967, Invalid=3589, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 16:12:52,850 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 758 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:52,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 832 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:12:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-18 16:12:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2023-02-18 16:12:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 184 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2023-02-18 16:12:52,921 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2023-02-18 16:12:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:52,922 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2023-02-18 16:12:52,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2023-02-18 16:12:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 16:12:52,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:52,922 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:52,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:53,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-18 16:12:53,123 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2023-02-18 16:12:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:53,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689029906] [2023-02-18 16:12:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:53,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:53,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689029906] [2023-02-18 16:12:53,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689029906] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:53,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52346163] [2023-02-18 16:12:53,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:12:53,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:53,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:53,236 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:53,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 16:12:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 16:12:53,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:53,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:12:53,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52346163] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:53,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:53,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-02-18 16:12:53,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254437123] [2023-02-18 16:12:53,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:53,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:12:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:12:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:12:53,622 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:54,158 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2023-02-18 16:12:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 16:12:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 16:12:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:54,159 INFO L225 Difference]: With dead ends: 286 [2023-02-18 16:12:54,159 INFO L226 Difference]: Without dead ends: 270 [2023-02-18 16:12:54,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:12:54,160 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 776 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:54,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 2028 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:12:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-02-18 16:12:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2023-02-18 16:12:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2023-02-18 16:12:54,218 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2023-02-18 16:12:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:54,218 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2023-02-18 16:12:54,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2023-02-18 16:12:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 16:12:54,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:54,219 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:54,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:54,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-18 16:12:54,424 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2023-02-18 16:12:54,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:54,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969540080] [2023-02-18 16:12:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:54,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969540080] [2023-02-18 16:12:54,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969540080] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:54,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376490188] [2023-02-18 16:12:54,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:12:54,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:54,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:54,485 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:54,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 16:12:54,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:12:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:54,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 16:12:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:54,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:54,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376490188] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:54,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:54,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-02-18 16:12:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318848818] [2023-02-18 16:12:54,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:54,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 16:12:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 16:12:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-02-18 16:12:54,585 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:54,702 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2023-02-18 16:12:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 16:12:54,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 16:12:54,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:54,703 INFO L225 Difference]: With dead ends: 247 [2023-02-18 16:12:54,703 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 16:12:54,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2023-02-18 16:12:54,705 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 82 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:54,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 203 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 16:12:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2023-02-18 16:12:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 209 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2023-02-18 16:12:54,773 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2023-02-18 16:12:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:54,774 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2023-02-18 16:12:54,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2023-02-18 16:12:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 16:12:54,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:54,776 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:54,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:54,981 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2023-02-18 16:12:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:54,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616797849] [2023-02-18 16:12:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:55,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616797849] [2023-02-18 16:12:55,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616797849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866638776] [2023-02-18 16:12:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:12:55,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:55,022 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:55,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-18 16:12:55,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 16:12:55,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:55,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 16:12:55,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 16:12:55,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866638776] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:55,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:55,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-02-18 16:12:55,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338863991] [2023-02-18 16:12:55,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:55,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 16:12:55,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:55,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 16:12:55,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-02-18 16:12:55,152 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:55,310 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2023-02-18 16:12:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 16:12:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 16:12:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:55,311 INFO L225 Difference]: With dead ends: 443 [2023-02-18 16:12:55,311 INFO L226 Difference]: Without dead ends: 353 [2023-02-18 16:12:55,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2023-02-18 16:12:55,317 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 216 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:55,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 293 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:12:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-02-18 16:12:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2023-02-18 16:12:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2023-02-18 16:12:55,391 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2023-02-18 16:12:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:55,393 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2023-02-18 16:12:55,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2023-02-18 16:12:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:12:55,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:55,393 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:55,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-02-18 16:12:55,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-18 16:12:55,598 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2023-02-18 16:12:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:55,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583129903] [2023-02-18 16:12:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:55,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583129903] [2023-02-18 16:12:55,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583129903] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275487779] [2023-02-18 16:12:55,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:12:55,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:55,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:55,853 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:55,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-18 16:12:55,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:12:55,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:55,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 16:12:55,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:56,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:12:56,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275487779] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:56,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:56,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 38 [2023-02-18 16:12:56,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359487949] [2023-02-18 16:12:56,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:56,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 16:12:56,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 16:12:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1314, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 16:12:56,296 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:57,154 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2023-02-18 16:12:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 16:12:57,154 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 16:12:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:57,155 INFO L225 Difference]: With dead ends: 464 [2023-02-18 16:12:57,156 INFO L226 Difference]: Without dead ends: 455 [2023-02-18 16:12:57,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 22 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=3377, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 16:12:57,158 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 250 mSDsluCounter, 2154 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:57,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 2254 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:12:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-02-18 16:12:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2023-02-18 16:12:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1796875) internal successors, (302), 256 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2023-02-18 16:12:57,236 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2023-02-18 16:12:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:57,236 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2023-02-18 16:12:57,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2023-02-18 16:12:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:12:57,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:57,237 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:57,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:57,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:57,442 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2023-02-18 16:12:57,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:57,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613882609] [2023-02-18 16:12:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:57,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:57,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:57,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613882609] [2023-02-18 16:12:57,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613882609] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:57,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801565890] [2023-02-18 16:12:57,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:12:57,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:57,651 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:57,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-18 16:12:57,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 16:12:57,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 16:12:57,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:12:58,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801565890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:58,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:58,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 36 [2023-02-18 16:12:58,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160154288] [2023-02-18 16:12:58,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:58,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 16:12:58,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 16:12:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 16:12:58,073 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:58,708 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2023-02-18 16:12:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 16:12:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 16:12:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:58,709 INFO L225 Difference]: With dead ends: 364 [2023-02-18 16:12:58,709 INFO L226 Difference]: Without dead ends: 340 [2023-02-18 16:12:58,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 19 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 16:12:58,710 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 167 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:58,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1368 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:12:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-18 16:12:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2023-02-18 16:12:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2023-02-18 16:12:58,786 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2023-02-18 16:12:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:58,786 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2023-02-18 16:12:58,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2023-02-18 16:12:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:12:58,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:58,787 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:58,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:58,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-18 16:12:58,992 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2023-02-18 16:12:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:58,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763678054] [2023-02-18 16:12:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:12:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 16:12:59,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:12:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763678054] [2023-02-18 16:12:59,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763678054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:12:59,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518840279] [2023-02-18 16:12:59,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:12:59,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:12:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:12:59,070 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:12:59,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-18 16:12:59,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 16:12:59,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:12:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:12:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:12:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 16:12:59,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:12:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 16:12:59,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518840279] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:12:59,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:12:59,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-02-18 16:12:59,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696970247] [2023-02-18 16:12:59,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:12:59,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:12:59,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:12:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:12:59,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:12:59,305 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:12:59,598 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2023-02-18 16:12:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 16:12:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 16:12:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:12:59,600 INFO L225 Difference]: With dead ends: 359 [2023-02-18 16:12:59,600 INFO L226 Difference]: Without dead ends: 314 [2023-02-18 16:12:59,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 16:12:59,600 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 439 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:12:59,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 460 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:12:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-02-18 16:12:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2023-02-18 16:12:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.161764705882353) internal successors, (316), 272 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2023-02-18 16:12:59,685 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2023-02-18 16:12:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:12:59,685 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2023-02-18 16:12:59,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:12:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2023-02-18 16:12:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:12:59,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:12:59,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:12:59,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-18 16:12:59,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-18 16:12:59,887 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:12:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:12:59,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2023-02-18 16:12:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:12:59,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388965983] [2023-02-18 16:12:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:12:59,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:12:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388965983] [2023-02-18 16:13:00,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388965983] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065698215] [2023-02-18 16:13:00,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:13:00,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:00,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:00,065 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:00,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-18 16:13:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 16:13:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:00,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:00,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065698215] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:00,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:00,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2023-02-18 16:13:00,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132254238] [2023-02-18 16:13:00,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:00,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:13:00,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:13:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:13:00,443 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:01,002 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2023-02-18 16:13:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:13:01,002 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 16:13:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:01,003 INFO L225 Difference]: With dead ends: 352 [2023-02-18 16:13:01,003 INFO L226 Difference]: Without dead ends: 327 [2023-02-18 16:13:01,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 16:13:01,004 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 138 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:01,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 874 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-18 16:13:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2023-02-18 16:13:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 270 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2023-02-18 16:13:01,098 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2023-02-18 16:13:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:01,098 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2023-02-18 16:13:01,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2023-02-18 16:13:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:13:01,099 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:01,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:01,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:01,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-18 16:13:01,305 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:01,305 INFO L85 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2023-02-18 16:13:01,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:01,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430573686] [2023-02-18 16:13:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:01,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 16:13:01,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:01,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430573686] [2023-02-18 16:13:01,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430573686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024464215] [2023-02-18 16:13:01,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:13:01,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:01,377 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:01,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-18 16:13:01,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:13:01,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:13:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 16:13:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 16:13:01,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024464215] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:01,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:01,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-02-18 16:13:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498303198] [2023-02-18 16:13:01,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:01,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:13:01,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:01,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:13:01,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:13:01,639 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:02,002 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2023-02-18 16:13:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 16:13:02,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 16:13:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:02,003 INFO L225 Difference]: With dead ends: 318 [2023-02-18 16:13:02,003 INFO L226 Difference]: Without dead ends: 294 [2023-02-18 16:13:02,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 16:13:02,006 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 334 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:02,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 1006 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:13:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-02-18 16:13:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2023-02-18 16:13:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2023-02-18 16:13:02,124 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2023-02-18 16:13:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:02,125 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2023-02-18 16:13:02,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2023-02-18 16:13:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 16:13:02,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:02,126 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:02,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-18 16:13:02,331 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2023-02-18 16:13:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:02,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797610285] [2023-02-18 16:13:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:02,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:02,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797610285] [2023-02-18 16:13:02,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797610285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:02,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444380683] [2023-02-18 16:13:02,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:13:02,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:02,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:02,478 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:02,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-18 16:13:02,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:13:02,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:02,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 16:13:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:02,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:02,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444380683] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:02,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:02,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-18 16:13:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493717819] [2023-02-18 16:13:02,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:02,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:13:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:13:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:13:02,966 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:03,841 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2023-02-18 16:13:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 16:13:03,842 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 16:13:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:03,843 INFO L225 Difference]: With dead ends: 470 [2023-02-18 16:13:03,843 INFO L226 Difference]: Without dead ends: 434 [2023-02-18 16:13:03,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1424, Invalid=5382, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 16:13:03,843 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1104 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:03,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 984 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-02-18 16:13:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2023-02-18 16:13:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 300 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2023-02-18 16:13:03,946 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2023-02-18 16:13:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:03,947 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2023-02-18 16:13:03,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2023-02-18 16:13:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 16:13:03,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:03,948 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:03,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-18 16:13:04,153 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2023-02-18 16:13:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468171091] [2023-02-18 16:13:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468171091] [2023-02-18 16:13:04,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468171091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702896051] [2023-02-18 16:13:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:13:04,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:04,302 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:04,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-18 16:13:04,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:13:04,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 16:13:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:04,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702896051] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:04,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:04,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-18 16:13:04,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668273214] [2023-02-18 16:13:04,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:04,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:13:04,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:13:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:13:04,810 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:05,558 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2023-02-18 16:13:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:13:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 16:13:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:05,560 INFO L225 Difference]: With dead ends: 456 [2023-02-18 16:13:05,560 INFO L226 Difference]: Without dead ends: 438 [2023-02-18 16:13:05,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=3060, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:13:05,560 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 877 mSDsluCounter, 2075 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:05,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 2191 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:13:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-02-18 16:13:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2023-02-18 16:13:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 304 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2023-02-18 16:13:05,678 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2023-02-18 16:13:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:05,678 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2023-02-18 16:13:05,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2023-02-18 16:13:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 16:13:05,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:05,679 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:05,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:05,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-18 16:13:05,884 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2023-02-18 16:13:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947717854] [2023-02-18 16:13:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:05,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:05,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:05,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947717854] [2023-02-18 16:13:05,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947717854] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:05,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800107736] [2023-02-18 16:13:05,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:13:05,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:05,928 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:05,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-18 16:13:05,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 16:13:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:05,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 16:13:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:06,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:06,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800107736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:06,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:06,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-18 16:13:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217062809] [2023-02-18 16:13:06,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 16:13:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 16:13:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:13:06,046 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:06,221 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2023-02-18 16:13:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 16:13:06,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 16:13:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:06,224 INFO L225 Difference]: With dead ends: 394 [2023-02-18 16:13:06,224 INFO L226 Difference]: Without dead ends: 314 [2023-02-18 16:13:06,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2023-02-18 16:13:06,225 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 126 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:06,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 259 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-02-18 16:13:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2023-02-18 16:13:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2023-02-18 16:13:06,330 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2023-02-18 16:13:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:06,330 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2023-02-18 16:13:06,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2023-02-18 16:13:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 16:13:06,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:06,331 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:06,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:06,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-02-18 16:13:06,536 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2023-02-18 16:13:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:06,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952896984] [2023-02-18 16:13:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:06,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:06,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952896984] [2023-02-18 16:13:06,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952896984] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:06,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119243328] [2023-02-18 16:13:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:13:06,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:06,594 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:06,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-18 16:13:06,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 16:13:06,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 16:13:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:06,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:06,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119243328] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:06,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-18 16:13:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181204949] [2023-02-18 16:13:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 16:13:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 16:13:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:13:06,750 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:06,928 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2023-02-18 16:13:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 16:13:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 16:13:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:06,931 INFO L225 Difference]: With dead ends: 321 [2023-02-18 16:13:06,931 INFO L226 Difference]: Without dead ends: 315 [2023-02-18 16:13:06,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2023-02-18 16:13:06,932 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:06,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 284 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-02-18 16:13:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2023-02-18 16:13:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2023-02-18 16:13:07,046 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2023-02-18 16:13:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:07,046 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2023-02-18 16:13:07,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2023-02-18 16:13:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 16:13:07,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:07,046 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:07,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:07,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:07,247 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:07,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2023-02-18 16:13:07,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:07,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166091075] [2023-02-18 16:13:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:07,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166091075] [2023-02-18 16:13:07,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166091075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228113762] [2023-02-18 16:13:07,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:13:07,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:07,506 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:07,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-18 16:13:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:07,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:13:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:07,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:08,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228113762] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:08,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:08,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 41 [2023-02-18 16:13:08,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078028696] [2023-02-18 16:13:08,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:08,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 16:13:08,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:08,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 16:13:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 16:13:08,021 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:09,077 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2023-02-18 16:13:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 16:13:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 16:13:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:09,079 INFO L225 Difference]: With dead ends: 540 [2023-02-18 16:13:09,079 INFO L226 Difference]: Without dead ends: 531 [2023-02-18 16:13:09,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 32 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 16:13:09,080 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 272 mSDsluCounter, 2861 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:09,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 2978 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:13:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-02-18 16:13:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2023-02-18 16:13:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 300 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2023-02-18 16:13:09,195 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2023-02-18 16:13:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:09,195 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2023-02-18 16:13:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2023-02-18 16:13:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 16:13:09,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:09,196 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:09,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-02-18 16:13:09,401 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2023-02-18 16:13:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:09,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930740127] [2023-02-18 16:13:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930740127] [2023-02-18 16:13:09,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930740127] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467499441] [2023-02-18 16:13:09,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:13:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:09,644 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:09,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-18 16:13:09,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:13:09,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 16:13:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:09,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:10,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467499441] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:10,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:10,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2023-02-18 16:13:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241497865] [2023-02-18 16:13:10,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:10,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:13:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:13:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:13:10,133 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:11,007 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2023-02-18 16:13:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 16:13:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 16:13:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:11,009 INFO L225 Difference]: With dead ends: 427 [2023-02-18 16:13:11,009 INFO L226 Difference]: Without dead ends: 402 [2023-02-18 16:13:11,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 35 SyntacticMatches, 22 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 16:13:11,009 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 182 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:11,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2248 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:13:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-02-18 16:13:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2023-02-18 16:13:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2023-02-18 16:13:11,116 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2023-02-18 16:13:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:11,116 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2023-02-18 16:13:11,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2023-02-18 16:13:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 16:13:11,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:11,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:11,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:11,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:11,322 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2023-02-18 16:13:11,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:11,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725392787] [2023-02-18 16:13:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:11,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:11,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725392787] [2023-02-18 16:13:11,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725392787] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:11,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638336488] [2023-02-18 16:13:11,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:13:11,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:11,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:11,525 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:11,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-18 16:13:11,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 16:13:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 16:13:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:11,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:11,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638336488] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:11,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:11,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2023-02-18 16:13:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318631451] [2023-02-18 16:13:11,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:11,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 16:13:11,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 16:13:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 16:13:11,960 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:12,560 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2023-02-18 16:13:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:13:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 16:13:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:12,561 INFO L225 Difference]: With dead ends: 352 [2023-02-18 16:13:12,561 INFO L226 Difference]: Without dead ends: 326 [2023-02-18 16:13:12,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 18 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=2921, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:13:12,564 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 143 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:12,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1218 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-02-18 16:13:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2023-02-18 16:13:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1357142857142857) internal successors, (318), 280 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2023-02-18 16:13:12,674 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2023-02-18 16:13:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:12,674 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2023-02-18 16:13:12,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2023-02-18 16:13:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 16:13:12,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:12,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:12,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-02-18 16:13:12,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:12,875 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2023-02-18 16:13:12,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:12,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503421360] [2023-02-18 16:13:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:12,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:13,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503421360] [2023-02-18 16:13:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503421360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970997358] [2023-02-18 16:13:13,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:13:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:13,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:13,052 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:13,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-18 16:13:13,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:13:13,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:13,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 16:13:13,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:13,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:13,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970997358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:13,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:13,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2023-02-18 16:13:13,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869194759] [2023-02-18 16:13:13,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:13,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 16:13:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 16:13:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 16:13:13,447 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:13,954 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2023-02-18 16:13:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 16:13:13,954 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 16:13:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:13,955 INFO L225 Difference]: With dead ends: 324 [2023-02-18 16:13:13,955 INFO L226 Difference]: Without dead ends: 318 [2023-02-18 16:13:13,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 14 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=2591, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:13:13,956 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:13,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 507 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-18 16:13:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2023-02-18 16:13:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2023-02-18 16:13:14,072 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2023-02-18 16:13:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:14,073 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2023-02-18 16:13:14,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2023-02-18 16:13:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 16:13:14,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:14,074 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:14,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-18 16:13:14,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-02-18 16:13:14,275 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:14,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2023-02-18 16:13:14,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969705998] [2023-02-18 16:13:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:14,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:14,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:14,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969705998] [2023-02-18 16:13:14,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969705998] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:14,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346111489] [2023-02-18 16:13:14,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:13:14,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:14,447 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:14,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-18 16:13:14,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:13:14,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 16:13:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:14,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:15,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346111489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:15,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:15,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-02-18 16:13:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306841747] [2023-02-18 16:13:15,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:15,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:13:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:15,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:13:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:13:15,109 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:16,440 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2023-02-18 16:13:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 16:13:16,441 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-18 16:13:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:16,442 INFO L225 Difference]: With dead ends: 520 [2023-02-18 16:13:16,442 INFO L226 Difference]: Without dead ends: 482 [2023-02-18 16:13:16,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2007, Invalid=7695, Unknown=0, NotChecked=0, Total=9702 [2023-02-18 16:13:16,442 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1340 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:16,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 1230 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:13:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-02-18 16:13:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2023-02-18 16:13:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 323 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2023-02-18 16:13:16,569 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2023-02-18 16:13:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:16,569 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2023-02-18 16:13:16,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2023-02-18 16:13:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 16:13:16,569 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:16,569 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:16,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-02-18 16:13:16,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-18 16:13:16,774 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2023-02-18 16:13:16,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:16,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879578727] [2023-02-18 16:13:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:16,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:16,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:16,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879578727] [2023-02-18 16:13:16,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879578727] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:16,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091765153] [2023-02-18 16:13:16,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:13:16,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:16,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:16,936 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:16,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-18 16:13:16,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 16:13:16,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 16:13:16,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:17,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091765153] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:17,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:17,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-02-18 16:13:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496097076] [2023-02-18 16:13:17,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:17,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:13:17,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:13:17,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:13:17,561 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:18,640 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2023-02-18 16:13:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:13:18,641 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-18 16:13:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:18,642 INFO L225 Difference]: With dead ends: 505 [2023-02-18 16:13:18,642 INFO L226 Difference]: Without dead ends: 486 [2023-02-18 16:13:18,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=3984, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 16:13:18,643 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1168 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:18,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 3175 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:13:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-02-18 16:13:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2023-02-18 16:13:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1345565749235473) internal successors, (371), 327 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2023-02-18 16:13:18,785 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2023-02-18 16:13:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:18,786 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2023-02-18 16:13:18,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2023-02-18 16:13:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 16:13:18,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:18,786 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:18,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-18 16:13:18,987 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:18,987 INFO L85 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2023-02-18 16:13:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:18,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605999790] [2023-02-18 16:13:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:19,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:19,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605999790] [2023-02-18 16:13:19,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605999790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:19,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39199877] [2023-02-18 16:13:19,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:13:19,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:19,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:19,037 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:19,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-18 16:13:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 16:13:19,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:19,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:19,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39199877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:19,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:19,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-02-18 16:13:19,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170744856] [2023-02-18 16:13:19,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:19,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 16:13:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 16:13:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:13:19,157 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:19,479 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2023-02-18 16:13:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 16:13:19,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-18 16:13:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:19,481 INFO L225 Difference]: With dead ends: 404 [2023-02-18 16:13:19,481 INFO L226 Difference]: Without dead ends: 389 [2023-02-18 16:13:19,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:13:19,484 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 138 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:19,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 266 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-02-18 16:13:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2023-02-18 16:13:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1492957746478873) internal successors, (408), 355 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2023-02-18 16:13:19,665 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2023-02-18 16:13:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:19,665 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2023-02-18 16:13:19,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2023-02-18 16:13:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 16:13:19,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:19,666 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:19,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:19,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-18 16:13:19,869 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2023-02-18 16:13:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:19,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660427111] [2023-02-18 16:13:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:19,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:19,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660427111] [2023-02-18 16:13:19,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660427111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:19,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850788878] [2023-02-18 16:13:19,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:13:19,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:19,923 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:19,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-18 16:13:19,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:13:19,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:19,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 16:13:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:20,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:20,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850788878] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:20,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:20,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-02-18 16:13:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991488231] [2023-02-18 16:13:20,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 16:13:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:20,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 16:13:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:13:20,052 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:20,446 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2023-02-18 16:13:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 16:13:20,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-18 16:13:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:20,448 INFO L225 Difference]: With dead ends: 685 [2023-02-18 16:13:20,448 INFO L226 Difference]: Without dead ends: 561 [2023-02-18 16:13:20,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:13:20,448 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 367 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:20,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 350 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-02-18 16:13:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2023-02-18 16:13:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2023-02-18 16:13:20,636 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2023-02-18 16:13:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:20,636 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2023-02-18 16:13:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2023-02-18 16:13:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:13:20,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:20,637 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:20,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-02-18 16:13:20,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-18 16:13:20,839 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:20,839 INFO L85 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2023-02-18 16:13:20,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:20,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136336492] [2023-02-18 16:13:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:20,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:21,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136336492] [2023-02-18 16:13:21,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136336492] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8883493] [2023-02-18 16:13:21,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:13:21,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:21,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:21,143 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:21,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-18 16:13:21,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:13:21,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:13:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:21,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:21,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8883493] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:21,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:21,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2023-02-18 16:13:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275395510] [2023-02-18 16:13:21,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:21,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:13:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:13:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:13:21,783 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:23,259 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2023-02-18 16:13:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:13:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 16:13:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:23,261 INFO L225 Difference]: With dead ends: 761 [2023-02-18 16:13:23,261 INFO L226 Difference]: Without dead ends: 752 [2023-02-18 16:13:23,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 28 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 16:13:23,261 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 297 mSDsluCounter, 3557 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 3691 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:23,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 3691 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:13:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-02-18 16:13:23,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2023-02-18 16:13:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1492890995260663) internal successors, (485), 422 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2023-02-18 16:13:23,449 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2023-02-18 16:13:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:23,449 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2023-02-18 16:13:23,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2023-02-18 16:13:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:13:23,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:23,450 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:23,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-02-18 16:13:23,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:23,651 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:23,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2023-02-18 16:13:23,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:23,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864301020] [2023-02-18 16:13:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:23,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:23,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:23,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864301020] [2023-02-18 16:13:23,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864301020] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:23,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723385479] [2023-02-18 16:13:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:13:23,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:24,005 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:24,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-18 16:13:24,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:13:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:13:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:24,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:24,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723385479] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:24,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:24,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 42 [2023-02-18 16:13:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410298379] [2023-02-18 16:13:24,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 16:13:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 16:13:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 16:13:24,592 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:26,003 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2023-02-18 16:13:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 16:13:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 16:13:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:26,005 INFO L225 Difference]: With dead ends: 623 [2023-02-18 16:13:26,005 INFO L226 Difference]: Without dead ends: 597 [2023-02-18 16:13:26,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 26 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 16:13:26,006 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 210 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:26,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2846 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:13:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-02-18 16:13:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2023-02-18 16:13:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2023-02-18 16:13:26,200 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2023-02-18 16:13:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:26,200 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2023-02-18 16:13:26,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2023-02-18 16:13:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:13:26,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:26,201 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:26,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-02-18 16:13:26,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:26,402 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:26,402 INFO L85 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2023-02-18 16:13:26,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:26,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681869303] [2023-02-18 16:13:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:26,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:26,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681869303] [2023-02-18 16:13:26,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681869303] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:26,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386005416] [2023-02-18 16:13:26,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:13:26,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:26,655 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:26,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-18 16:13:26,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 16:13:26,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 16:13:26,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:26,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:27,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386005416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:27,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:27,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2023-02-18 16:13:27,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393378633] [2023-02-18 16:13:27,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:27,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 16:13:27,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 16:13:27,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 16:13:27,185 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:28,195 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2023-02-18 16:13:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:13:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 16:13:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:28,196 INFO L225 Difference]: With dead ends: 530 [2023-02-18 16:13:28,196 INFO L226 Difference]: Without dead ends: 503 [2023-02-18 16:13:28,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 22 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=3493, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 16:13:28,197 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 164 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:28,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1747 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:13:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-18 16:13:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2023-02-18 16:13:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 402 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2023-02-18 16:13:28,416 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2023-02-18 16:13:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:28,416 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2023-02-18 16:13:28,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2023-02-18 16:13:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:13:28,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:28,417 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:28,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:28,621 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2023-02-18 16:13:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:28,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172219372] [2023-02-18 16:13:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:13:28,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:28,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172219372] [2023-02-18 16:13:28,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172219372] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:28,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563311123] [2023-02-18 16:13:28,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:13:28,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:28,707 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:28,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-18 16:13:28,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:13:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 16:13:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:13:28,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:13:28,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563311123] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:28,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:28,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-02-18 16:13:28,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136457540] [2023-02-18 16:13:28,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:28,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:13:28,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:13:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:13:28,995 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:29,591 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2023-02-18 16:13:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:13:29,591 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 16:13:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:29,593 INFO L225 Difference]: With dead ends: 556 [2023-02-18 16:13:29,593 INFO L226 Difference]: Without dead ends: 502 [2023-02-18 16:13:29,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=619, Invalid=2243, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:13:29,593 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 841 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:29,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 645 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:13:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-02-18 16:13:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2023-02-18 16:13:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.1348314606741574) internal successors, (505), 445 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2023-02-18 16:13:29,819 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2023-02-18 16:13:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:29,819 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2023-02-18 16:13:29,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2023-02-18 16:13:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:13:29,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:29,820 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:29,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-02-18 16:13:30,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:30,021 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2023-02-18 16:13:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:30,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520826984] [2023-02-18 16:13:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:30,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:30,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520826984] [2023-02-18 16:13:30,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520826984] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:30,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684429367] [2023-02-18 16:13:30,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:13:30,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:30,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:30,237 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:30,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-18 16:13:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 16:13:30,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:30,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684429367] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:30,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:30,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2023-02-18 16:13:30,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663794626] [2023-02-18 16:13:30,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:30,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 16:13:30,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 16:13:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 16:13:30,708 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:31,469 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2023-02-18 16:13:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 16:13:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 16:13:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:31,470 INFO L225 Difference]: With dead ends: 532 [2023-02-18 16:13:31,470 INFO L226 Difference]: Without dead ends: 504 [2023-02-18 16:13:31,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=3023, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 16:13:31,471 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 138 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:31,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 876 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-18 16:13:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2023-02-18 16:13:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1380090497737556) internal successors, (503), 442 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2023-02-18 16:13:31,681 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2023-02-18 16:13:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:31,681 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2023-02-18 16:13:31,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2023-02-18 16:13:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:13:31,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:31,682 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:31,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:31,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-02-18 16:13:31,887 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2023-02-18 16:13:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:31,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309579020] [2023-02-18 16:13:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:13:31,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:31,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309579020] [2023-02-18 16:13:31,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309579020] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:31,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645367930] [2023-02-18 16:13:31,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:13:31,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:31,978 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-18 16:13:32,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:13:32,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 16:13:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:13:32,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:13:32,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645367930] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:32,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:32,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-02-18 16:13:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964159875] [2023-02-18 16:13:32,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:32,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:13:32,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:13:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:13:32,296 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:32,870 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2023-02-18 16:13:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 16:13:32,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 16:13:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:32,872 INFO L225 Difference]: With dead ends: 505 [2023-02-18 16:13:32,872 INFO L226 Difference]: Without dead ends: 476 [2023-02-18 16:13:32,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 16:13:32,872 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 492 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:32,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1481 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-02-18 16:13:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2023-02-18 16:13:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1199095022624435) internal successors, (495), 442 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2023-02-18 16:13:33,091 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2023-02-18 16:13:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:33,091 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2023-02-18 16:13:33,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2023-02-18 16:13:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 16:13:33,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:33,092 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:33,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:33,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-18 16:13:33,292 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2023-02-18 16:13:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:33,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295667124] [2023-02-18 16:13:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:33,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:33,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295667124] [2023-02-18 16:13:33,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295667124] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008316040] [2023-02-18 16:13:33,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:13:33,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:33,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:33,473 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:33,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-18 16:13:33,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 16:13:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:33,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 16:13:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:33,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:34,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008316040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:34,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:34,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-02-18 16:13:34,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139251544] [2023-02-18 16:13:34,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:34,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:13:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:13:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:13:34,213 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:35,975 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2023-02-18 16:13:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 16:13:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 16:13:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:35,977 INFO L225 Difference]: With dead ends: 768 [2023-02-18 16:13:35,977 INFO L226 Difference]: Without dead ends: 726 [2023-02-18 16:13:35,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2734, Invalid=10606, Unknown=0, NotChecked=0, Total=13340 [2023-02-18 16:13:35,978 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 2191 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:35,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2191 Valid, 1408 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:13:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-02-18 16:13:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2023-02-18 16:13:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 489 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2023-02-18 16:13:36,244 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2023-02-18 16:13:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:36,244 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2023-02-18 16:13:36,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2023-02-18 16:13:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 16:13:36,245 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:36,246 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:36,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-02-18 16:13:36,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-02-18 16:13:36,450 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2023-02-18 16:13:36,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:36,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951262634] [2023-02-18 16:13:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:36,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:36,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951262634] [2023-02-18 16:13:36,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951262634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:36,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225354870] [2023-02-18 16:13:36,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:13:36,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:36,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:36,666 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:36,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-18 16:13:36,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:13:36,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:36,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 16:13:36,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:37,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:37,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225354870] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:37,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:37,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-02-18 16:13:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515312263] [2023-02-18 16:13:37,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:13:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:37,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:13:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:13:37,417 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:39,034 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2023-02-18 16:13:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:13:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 16:13:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:39,037 INFO L225 Difference]: With dead ends: 752 [2023-02-18 16:13:39,037 INFO L226 Difference]: Without dead ends: 731 [2023-02-18 16:13:39,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=520, Invalid=5030, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 16:13:39,037 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1436 mSDsluCounter, 3677 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 3825 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:39,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 3825 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:13:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2023-02-18 16:13:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2023-02-18 16:13:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1174089068825912) internal successors, (552), 494 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2023-02-18 16:13:39,336 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2023-02-18 16:13:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:39,336 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2023-02-18 16:13:39,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2023-02-18 16:13:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 16:13:39,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:39,337 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:39,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:39,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:39,541 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2023-02-18 16:13:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:39,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341759900] [2023-02-18 16:13:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:13:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:39,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341759900] [2023-02-18 16:13:39,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341759900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:39,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151418126] [2023-02-18 16:13:39,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:13:39,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:39,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:39,604 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:39,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-18 16:13:39,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 16:13:39,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:39,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 16:13:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:13:39,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:13:39,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151418126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:39,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:39,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-18 16:13:39,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563291584] [2023-02-18 16:13:39,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:39,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 16:13:39,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 16:13:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2023-02-18 16:13:39,758 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:40,184 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2023-02-18 16:13:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:13:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 16:13:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:40,186 INFO L225 Difference]: With dead ends: 622 [2023-02-18 16:13:40,186 INFO L226 Difference]: Without dead ends: 514 [2023-02-18 16:13:40,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2023-02-18 16:13:40,186 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 133 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:40,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 310 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-02-18 16:13:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2023-02-18 16:13:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.1125) internal successors, (534), 480 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2023-02-18 16:13:40,499 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2023-02-18 16:13:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:40,500 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2023-02-18 16:13:40,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2023-02-18 16:13:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 16:13:40,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:40,501 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:40,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:40,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:40,701 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2023-02-18 16:13:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:40,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821284855] [2023-02-18 16:13:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:40,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:13:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821284855] [2023-02-18 16:13:40,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821284855] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398831083] [2023-02-18 16:13:40,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:13:40,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:40,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:40,767 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:40,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-02-18 16:13:40,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:13:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 16:13:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:13:40,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:13:40,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398831083] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:40,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:40,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-18 16:13:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220272900] [2023-02-18 16:13:40,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:40,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 16:13:40,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:40,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 16:13:40,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2023-02-18 16:13:40,903 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:41,318 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2023-02-18 16:13:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:13:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 16:13:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:41,319 INFO L225 Difference]: With dead ends: 521 [2023-02-18 16:13:41,319 INFO L226 Difference]: Without dead ends: 515 [2023-02-18 16:13:41,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2023-02-18 16:13:41,320 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 69 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:41,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 295 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-18 16:13:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2023-02-18 16:13:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2023-02-18 16:13:41,604 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2023-02-18 16:13:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:41,604 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2023-02-18 16:13:41,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2023-02-18 16:13:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 16:13:41,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:41,605 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:41,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:41,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-02-18 16:13:41,809 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:41,810 INFO L85 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2023-02-18 16:13:41,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:41,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065604709] [2023-02-18 16:13:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065604709] [2023-02-18 16:13:42,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065604709] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272771107] [2023-02-18 16:13:42,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:13:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:42,167 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:42,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-02-18 16:13:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:13:42,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:42,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:13:42,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272771107] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:42,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:42,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 47 [2023-02-18 16:13:42,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530444797] [2023-02-18 16:13:42,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 16:13:42,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:42,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 16:13:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:13:42,913 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:44,834 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2023-02-18 16:13:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 16:13:44,835 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 16:13:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:44,836 INFO L225 Difference]: With dead ends: 872 [2023-02-18 16:13:44,836 INFO L226 Difference]: Without dead ends: 863 [2023-02-18 16:13:44,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 32 SyntacticMatches, 31 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=340, Invalid=5360, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 16:13:44,837 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 320 mSDsluCounter, 4103 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 4254 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:44,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 4254 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:13:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-02-18 16:13:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2023-02-18 16:13:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2023-02-18 16:13:45,106 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2023-02-18 16:13:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2023-02-18 16:13:45,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2023-02-18 16:13:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 16:13:45,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:45,107 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:45,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:45,308 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2023-02-18 16:13:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256666405] [2023-02-18 16:13:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:45,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:45,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256666405] [2023-02-18 16:13:45,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256666405] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437976138] [2023-02-18 16:13:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:13:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:45,626 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:45,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-02-18 16:13:45,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:13:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:13:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:46,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:13:46,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437976138] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:46,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:46,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 45 [2023-02-18 16:13:46,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151038476] [2023-02-18 16:13:46,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:46,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 16:13:46,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 16:13:46,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1868, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 16:13:46,260 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:47,863 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2023-02-18 16:13:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 16:13:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 16:13:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:47,865 INFO L225 Difference]: With dead ends: 719 [2023-02-18 16:13:47,865 INFO L226 Difference]: Without dead ends: 692 [2023-02-18 16:13:47,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 35 SyntacticMatches, 28 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=4657, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 16:13:47,865 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 240 mSDsluCounter, 3228 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:47,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 3351 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:13:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2023-02-18 16:13:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2023-02-18 16:13:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2023-02-18 16:13:48,169 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2023-02-18 16:13:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:48,169 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2023-02-18 16:13:48,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2023-02-18 16:13:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 16:13:48,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:48,170 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:48,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:48,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:48,374 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:48,374 INFO L85 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2023-02-18 16:13:48,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:48,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665156760] [2023-02-18 16:13:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:48,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:48,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:48,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665156760] [2023-02-18 16:13:48,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665156760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:48,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473152659] [2023-02-18 16:13:48,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:13:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:48,632 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:48,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-02-18 16:13:48,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 16:13:48,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:13:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:48,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:13:49,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473152659] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:49,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:49,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2023-02-18 16:13:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401272316] [2023-02-18 16:13:49,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:49,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 16:13:49,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 16:13:49,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1695, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 16:13:49,216 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:50,400 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2023-02-18 16:13:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 16:13:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 16:13:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:50,402 INFO L225 Difference]: With dead ends: 617 [2023-02-18 16:13:50,402 INFO L226 Difference]: Without dead ends: 589 [2023-02-18 16:13:50,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 25 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=4115, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 16:13:50,403 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 191 mSDsluCounter, 2168 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:50,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 2257 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:13:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-02-18 16:13:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2023-02-18 16:13:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1127659574468085) internal successors, (523), 470 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2023-02-18 16:13:50,655 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2023-02-18 16:13:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:50,655 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2023-02-18 16:13:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2023-02-18 16:13:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 16:13:50,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:50,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:50,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-02-18 16:13:50,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-02-18 16:13:50,856 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2023-02-18 16:13:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:50,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232480454] [2023-02-18 16:13:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:51,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:51,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232480454] [2023-02-18 16:13:51,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232480454] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:51,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670183956] [2023-02-18 16:13:51,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:13:51,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:51,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:51,095 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:51,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-02-18 16:13:51,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:13:51,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:51,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 16:13:51,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:51,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:51,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670183956] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:51,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:51,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2023-02-18 16:13:51,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038961549] [2023-02-18 16:13:51,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:51,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 16:13:51,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 16:13:51,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 16:13:51,667 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:52,638 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2023-02-18 16:13:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 16:13:52,638 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 16:13:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:52,639 INFO L225 Difference]: With dead ends: 535 [2023-02-18 16:13:52,639 INFO L226 Difference]: Without dead ends: 506 [2023-02-18 16:13:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 21 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=3605, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 16:13:52,640 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 144 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:52,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1225 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:13:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2023-02-18 16:13:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2023-02-18 16:13:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.113785557986871) internal successors, (509), 457 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2023-02-18 16:13:52,900 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2023-02-18 16:13:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:52,900 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2023-02-18 16:13:52,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2023-02-18 16:13:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 16:13:52,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:52,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:52,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-02-18 16:13:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:53,105 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2023-02-18 16:13:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:53,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709532149] [2023-02-18 16:13:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:13:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709532149] [2023-02-18 16:13:53,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709532149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280155633] [2023-02-18 16:13:53,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:13:53,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:53,309 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:53,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-02-18 16:13:53,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 16:13:53,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:13:53,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 16:13:53,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:13:53,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280155633] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:53,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:53,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 22] total 44 [2023-02-18 16:13:53,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513591384] [2023-02-18 16:13:53,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:53,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:13:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:13:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1763, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:13:53,926 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:54,744 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2023-02-18 16:13:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:13:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 16:13:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:54,746 INFO L225 Difference]: With dead ends: 504 [2023-02-18 16:13:54,746 INFO L226 Difference]: Without dead ends: 498 [2023-02-18 16:13:54,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 41 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=360, Invalid=4332, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 16:13:54,746 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:54,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 552 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-02-18 16:13:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2023-02-18 16:13:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1148936170212767) internal successors, (524), 470 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2023-02-18 16:13:55,043 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2023-02-18 16:13:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:55,043 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2023-02-18 16:13:55,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2023-02-18 16:13:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 16:13:55,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:55,044 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:55,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:55,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-02-18 16:13:55,245 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:55,245 INFO L85 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2023-02-18 16:13:55,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:55,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344616226] [2023-02-18 16:13:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:55,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:55,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344616226] [2023-02-18 16:13:55,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344616226] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058968991] [2023-02-18 16:13:55,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:13:55,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:55,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:55,464 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:55,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-02-18 16:13:55,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-18 16:13:55,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 16:13:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:55,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:56,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058968991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:56,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:56,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2023-02-18 16:13:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679888488] [2023-02-18 16:13:56,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:56,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 16:13:56,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 16:13:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:13:56,389 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:58,797 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2023-02-18 16:13:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-18 16:13:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-18 16:13:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:58,802 INFO L225 Difference]: With dead ends: 834 [2023-02-18 16:13:58,803 INFO L226 Difference]: Without dead ends: 790 [2023-02-18 16:13:58,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3959 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3624, Invalid=14198, Unknown=0, NotChecked=0, Total=17822 [2023-02-18 16:13:58,803 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1956 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1956 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:58,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1956 Valid, 1860 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:13:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-02-18 16:13:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2023-02-18 16:13:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.113899613899614) internal successors, (577), 518 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2023-02-18 16:13:59,101 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2023-02-18 16:13:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:59,101 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2023-02-18 16:13:59,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:13:59,101 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2023-02-18 16:13:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 16:13:59,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:59,102 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:59,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:59,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-02-18 16:13:59,306 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2023-02-18 16:13:59,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:59,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205896461] [2023-02-18 16:13:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:13:59,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205896461] [2023-02-18 16:13:59,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205896461] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870708643] [2023-02-18 16:13:59,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:13:59,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:59,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:59,536 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:13:59,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-02-18 16:13:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:59,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 16:13:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:00,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:00,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870708643] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:00,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:00,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2023-02-18 16:14:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477141674] [2023-02-18 16:14:00,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:00,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 16:14:00,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 16:14:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:14:00,490 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:02,701 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2023-02-18 16:14:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 16:14:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-18 16:14:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:02,706 INFO L225 Difference]: With dead ends: 817 [2023-02-18 16:14:02,706 INFO L226 Difference]: Without dead ends: 795 [2023-02-18 16:14:02,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=608, Invalid=6198, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 16:14:02,707 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1911 mSDsluCounter, 4503 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 4667 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:02,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1911 Valid, 4667 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:14:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-02-18 16:14:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2023-02-18 16:14:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.112810707456979) internal successors, (582), 523 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2023-02-18 16:14:03,066 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2023-02-18 16:14:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:03,066 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2023-02-18 16:14:03,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2023-02-18 16:14:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 16:14:03,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:03,067 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:03,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-02-18 16:14:03,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:03,272 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:03,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2023-02-18 16:14:03,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:03,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079027897] [2023-02-18 16:14:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:14:03,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:03,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079027897] [2023-02-18 16:14:03,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079027897] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:03,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133912435] [2023-02-18 16:14:03,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:14:03,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:03,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:03,377 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:03,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-02-18 16:14:03,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:14:03,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:03,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 16:14:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:14:03,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:14:03,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133912435] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:03,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:03,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2023-02-18 16:14:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542883306] [2023-02-18 16:14:03,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:03,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 16:14:03,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 16:14:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-02-18 16:14:03,539 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:04,196 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2023-02-18 16:14:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:14:04,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-18 16:14:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:04,199 INFO L225 Difference]: With dead ends: 618 [2023-02-18 16:14:04,199 INFO L226 Difference]: Without dead ends: 602 [2023-02-18 16:14:04,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 16:14:04,199 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 215 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:04,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 299 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:14:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-02-18 16:14:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2023-02-18 16:14:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.125673249551167) internal successors, (627), 557 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2023-02-18 16:14:04,576 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2023-02-18 16:14:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:04,576 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2023-02-18 16:14:04,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2023-02-18 16:14:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 16:14:04,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:04,578 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:04,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-02-18 16:14:04,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:04,781 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2023-02-18 16:14:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660945249] [2023-02-18 16:14:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:14:04,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:04,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660945249] [2023-02-18 16:14:04,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660945249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:04,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820478321] [2023-02-18 16:14:04,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:14:04,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:04,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:04,862 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:04,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-02-18 16:14:04,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 16:14:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 16:14:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:14:04,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:14:05,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820478321] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:05,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:05,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2023-02-18 16:14:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423750098] [2023-02-18 16:14:05,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:05,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 16:14:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:05,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 16:14:05,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-02-18 16:14:05,017 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:05,817 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2023-02-18 16:14:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:14:05,817 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-18 16:14:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:05,819 INFO L225 Difference]: With dead ends: 996 [2023-02-18 16:14:05,819 INFO L226 Difference]: Without dead ends: 834 [2023-02-18 16:14:05,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 16:14:05,820 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 457 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:05,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 456 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:14:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-02-18 16:14:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2023-02-18 16:14:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2023-02-18 16:14:06,284 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2023-02-18 16:14:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:06,284 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2023-02-18 16:14:06,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2023-02-18 16:14:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:14:06,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:06,285 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:06,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-02-18 16:14:06,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-02-18 16:14:06,486 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2023-02-18 16:14:06,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:06,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456406931] [2023-02-18 16:14:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:06,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:14:06,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:06,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456406931] [2023-02-18 16:14:06,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456406931] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:06,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365951908] [2023-02-18 16:14:06,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:14:06,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:06,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:06,925 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:06,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-02-18 16:14:06,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:14:06,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:14:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:14:07,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:14:07,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365951908] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:07,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:07,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 50 [2023-02-18 16:14:07,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069061820] [2023-02-18 16:14:07,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:07,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 16:14:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 16:14:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 16:14:07,730 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:10,375 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2023-02-18 16:14:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 16:14:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 16:14:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:10,378 INFO L225 Difference]: With dead ends: 1165 [2023-02-18 16:14:10,378 INFO L226 Difference]: Without dead ends: 1156 [2023-02-18 16:14:10,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 34 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=359, Invalid=6121, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 16:14:10,379 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 349 mSDsluCounter, 5379 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 5547 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:10,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 5547 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:14:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2023-02-18 16:14:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2023-02-18 16:14:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.126543209876543) internal successors, (730), 648 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2023-02-18 16:14:10,794 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2023-02-18 16:14:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:10,794 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2023-02-18 16:14:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2023-02-18 16:14:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:14:10,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:10,796 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:10,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-02-18 16:14:10,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-02-18 16:14:11,000 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2023-02-18 16:14:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:11,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045708221] [2023-02-18 16:14:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:14:11,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:11,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045708221] [2023-02-18 16:14:11,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045708221] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:11,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336988955] [2023-02-18 16:14:11,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:14:11,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:11,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:11,374 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:11,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-02-18 16:14:11,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:14:11,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:14:11,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:14:11,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:14:12,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336988955] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:12,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:12,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2023-02-18 16:14:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525720440] [2023-02-18 16:14:12,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:12,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 16:14:12,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 16:14:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 16:14:12,135 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:14,479 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2023-02-18 16:14:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 16:14:14,479 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 16:14:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:14,481 INFO L225 Difference]: With dead ends: 983 [2023-02-18 16:14:14,481 INFO L226 Difference]: Without dead ends: 955 [2023-02-18 16:14:14,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 35 SyntacticMatches, 31 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=5369, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 16:14:14,482 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 264 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 4173 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:14,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 4173 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:14:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2023-02-18 16:14:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2023-02-18 16:14:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2023-02-18 16:14:14,878 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2023-02-18 16:14:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:14,878 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2023-02-18 16:14:14,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2023-02-18 16:14:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:14:14,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:14,879 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:14,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-02-18 16:14:15,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:15,079 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2023-02-18 16:14:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:15,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253937534] [2023-02-18 16:14:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:15,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:14:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253937534] [2023-02-18 16:14:15,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253937534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318467099] [2023-02-18 16:14:15,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:14:15,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:15,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:15,423 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:15,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-02-18 16:14:15,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:14:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:14:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:14:15,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:14:16,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318467099] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:16,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:16,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2023-02-18 16:14:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307268466] [2023-02-18 16:14:16,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 16:14:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:16,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 16:14:16,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 16:14:16,108 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:17,910 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2023-02-18 16:14:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 16:14:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 16:14:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:17,912 INFO L225 Difference]: With dead ends: 853 [2023-02-18 16:14:17,912 INFO L226 Difference]: Without dead ends: 824 [2023-02-18 16:14:17,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 28 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=4787, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 16:14:17,912 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 212 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2943 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:17,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 2943 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:14:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-18 16:14:18,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2023-02-18 16:14:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.127388535031847) internal successors, (708), 628 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2023-02-18 16:14:18,296 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2023-02-18 16:14:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:18,296 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2023-02-18 16:14:18,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2023-02-18 16:14:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:14:18,297 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:18,297 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:18,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-02-18 16:14:18,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:18,498 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2023-02-18 16:14:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997084195] [2023-02-18 16:14:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:18,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:14:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997084195] [2023-02-18 16:14:18,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997084195] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215127114] [2023-02-18 16:14:18,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:14:18,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:18,764 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:18,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-02-18 16:14:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:14:18,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:14:19,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:14:19,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215127114] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:19,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:19,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 44 [2023-02-18 16:14:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811988835] [2023-02-18 16:14:19,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:19,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:14:19,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:14:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:14:19,353 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:20,762 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2023-02-18 16:14:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 16:14:20,762 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 16:14:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:20,763 INFO L225 Difference]: With dead ends: 754 [2023-02-18 16:14:20,763 INFO L226 Difference]: Without dead ends: 724 [2023-02-18 16:14:20,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 23 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=4237, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 16:14:20,764 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 169 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1935 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:20,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1935 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:14:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-02-18 16:14:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2023-02-18 16:14:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.1284552845528455) internal successors, (694), 615 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2023-02-18 16:14:21,145 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2023-02-18 16:14:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:21,145 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2023-02-18 16:14:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2023-02-18 16:14:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:14:21,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:21,146 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:21,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-02-18 16:14:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2023-02-18 16:14:21,347 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2023-02-18 16:14:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736619634] [2023-02-18 16:14:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:21,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 16:14:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:21,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736619634] [2023-02-18 16:14:21,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736619634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:21,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567908529] [2023-02-18 16:14:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:14:21,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:21,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:21,451 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:21,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-02-18 16:14:21,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:14:21,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 16:14:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 16:14:21,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 16:14:21,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567908529] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:21,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:21,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-02-18 16:14:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448971206] [2023-02-18 16:14:21,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:14:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:14:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:14:21,836 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:22,831 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2023-02-18 16:14:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:14:22,832 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 16:14:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:22,833 INFO L225 Difference]: With dead ends: 816 [2023-02-18 16:14:22,833 INFO L226 Difference]: Without dead ends: 753 [2023-02-18 16:14:22,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=967, Invalid=3589, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 16:14:22,834 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1185 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:22,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 903 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:14:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-02-18 16:14:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2023-02-18 16:14:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.1147058823529412) internal successors, (758), 680 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2023-02-18 16:14:23,256 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2023-02-18 16:14:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:23,256 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2023-02-18 16:14:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2023-02-18 16:14:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:14:23,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:23,257 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:23,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-02-18 16:14:23,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:23,458 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2023-02-18 16:14:23,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:23,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808244317] [2023-02-18 16:14:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:23,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:14:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808244317] [2023-02-18 16:14:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808244317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958622390] [2023-02-18 16:14:23,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:14:23,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:23,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:23,694 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:23,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-02-18 16:14:23,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 16:14:23,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:23,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 16:14:23,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:14:24,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:14:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958622390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:24,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:24,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2023-02-18 16:14:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965016261] [2023-02-18 16:14:24,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 16:14:24,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 16:14:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 16:14:24,241 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:25,412 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2023-02-18 16:14:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 16:14:25,412 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 16:14:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:25,414 INFO L225 Difference]: With dead ends: 774 [2023-02-18 16:14:25,414 INFO L226 Difference]: Without dead ends: 743 [2023-02-18 16:14:25,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=3719, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 16:14:25,414 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 141 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:25,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 951 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:14:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2023-02-18 16:14:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2023-02-18 16:14:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1168639053254439) internal successors, (755), 676 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2023-02-18 16:14:25,854 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2023-02-18 16:14:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:25,855 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2023-02-18 16:14:25,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2023-02-18 16:14:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:14:25,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:25,856 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:25,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-02-18 16:14:26,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:26,056 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2023-02-18 16:14:26,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:26,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789425742] [2023-02-18 16:14:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 16:14:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789425742] [2023-02-18 16:14:26,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789425742] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466826845] [2023-02-18 16:14:26,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:14:26,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:26,168 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:26,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-02-18 16:14:26,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:14:26,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:26,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 16:14:26,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 16:14:26,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 16:14:26,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466826845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:26,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:26,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-02-18 16:14:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707227327] [2023-02-18 16:14:26,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:26,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:14:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:14:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:14:26,549 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:27,498 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2023-02-18 16:14:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 16:14:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 16:14:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:27,500 INFO L225 Difference]: With dead ends: 755 [2023-02-18 16:14:27,500 INFO L226 Difference]: Without dead ends: 721 [2023-02-18 16:14:27,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:14:27,500 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 753 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:27,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 1810 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:14:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2023-02-18 16:14:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2023-02-18 16:14:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1020710059171597) internal successors, (745), 676 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2023-02-18 16:14:27,939 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2023-02-18 16:14:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:27,939 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2023-02-18 16:14:27,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2023-02-18 16:14:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:14:27,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:27,940 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:27,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-02-18 16:14:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:28,141 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2023-02-18 16:14:28,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:28,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337826769] [2023-02-18 16:14:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:28,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:28,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:28,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337826769] [2023-02-18 16:14:28,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337826769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461370225] [2023-02-18 16:14:28,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:14:28,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:28,392 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:28,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-02-18 16:14:28,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 16:14:28,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 16:14:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:28,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:29,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461370225] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:29,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:29,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-02-18 16:14:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852179152] [2023-02-18 16:14:29,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:29,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 16:14:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 16:14:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:14:29,427 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:32,914 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2023-02-18 16:14:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-18 16:14:32,914 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 16:14:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:32,916 INFO L225 Difference]: With dead ends: 1173 [2023-02-18 16:14:32,916 INFO L226 Difference]: Without dead ends: 1125 [2023-02-18 16:14:32,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4697, Invalid=18559, Unknown=0, NotChecked=0, Total=23256 [2023-02-18 16:14:32,917 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 2267 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:32,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2267 Valid, 1968 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:14:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2023-02-18 16:14:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2023-02-18 16:14:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.101078167115903) internal successors, (817), 742 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2023-02-18 16:14:33,414 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2023-02-18 16:14:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:33,414 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2023-02-18 16:14:33,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2023-02-18 16:14:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:14:33,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:33,415 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:33,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-02-18 16:14:33,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-02-18 16:14:33,616 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:33,616 INFO L85 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2023-02-18 16:14:33,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116291846] [2023-02-18 16:14:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:33,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116291846] [2023-02-18 16:14:33,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116291846] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440355798] [2023-02-18 16:14:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:14:33,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:33,866 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:33,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-02-18 16:14:33,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 16:14:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 16:14:33,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:34,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:14:34,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440355798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:34,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:34,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-02-18 16:14:34,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242472279] [2023-02-18 16:14:34,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:34,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 16:14:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 16:14:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:14:34,942 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:38,004 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2023-02-18 16:14:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 16:14:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 16:14:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:38,006 INFO L225 Difference]: With dead ends: 1155 [2023-02-18 16:14:38,006 INFO L226 Difference]: Without dead ends: 1131 [2023-02-18 16:14:38,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=702, Invalid=7488, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 16:14:38,006 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 2149 mSDsluCounter, 5937 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:38,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2149 Valid, 6117 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:14:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2023-02-18 16:14:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2023-02-18 16:14:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1002673796791445) internal successors, (823), 748 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2023-02-18 16:14:38,529 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2023-02-18 16:14:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:38,530 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2023-02-18 16:14:38,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2023-02-18 16:14:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:14:38,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:38,531 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:38,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-02-18 16:14:38,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-02-18 16:14:38,731 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2023-02-18 16:14:38,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:38,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749979977] [2023-02-18 16:14:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:38,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:14:38,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749979977] [2023-02-18 16:14:38,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749979977] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341466119] [2023-02-18 16:14:38,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:14:38,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:38,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:38,806 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:38,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-02-18 16:14:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:14:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:14:38,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:14:38,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341466119] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:38,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:38,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-18 16:14:38,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181661383] [2023-02-18 16:14:38,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:38,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 16:14:38,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 16:14:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2023-02-18 16:14:38,978 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:39,723 INFO L93 Difference]: Finished difference Result 919 states and 1007 transitions. [2023-02-18 16:14:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 16:14:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 16:14:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:39,724 INFO L225 Difference]: With dead ends: 919 [2023-02-18 16:14:39,724 INFO L226 Difference]: Without dead ends: 779 [2023-02-18 16:14:39,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 16:14:39,725 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 181 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:39,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 382 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:14:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-02-18 16:14:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 735. [2023-02-18 16:14:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.0967302452316077) internal successors, (805), 734 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 805 transitions. [2023-02-18 16:14:40,236 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 805 transitions. Word has length 43 [2023-02-18 16:14:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:40,237 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 805 transitions. [2023-02-18 16:14:40,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 805 transitions. [2023-02-18 16:14:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:14:40,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:40,237 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:40,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-02-18 16:14:40,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-02-18 16:14:40,438 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:40,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2059418347, now seen corresponding path program 80 times [2023-02-18 16:14:40,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:40,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823696504] [2023-02-18 16:14:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:40,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:14:40,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:40,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823696504] [2023-02-18 16:14:40,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823696504] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:40,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491420685] [2023-02-18 16:14:40,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:14:40,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:40,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:40,516 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:40,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-02-18 16:14:40,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:14:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:14:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:14:40,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:14:40,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491420685] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:40,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:40,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-18 16:14:40,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590739476] [2023-02-18 16:14:40,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:40,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 16:14:40,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 16:14:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2023-02-18 16:14:40,686 INFO L87 Difference]: Start difference. First operand 735 states and 805 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:41,447 INFO L93 Difference]: Finished difference Result 786 states and 851 transitions. [2023-02-18 16:14:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 16:14:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 16:14:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:41,448 INFO L225 Difference]: With dead ends: 786 [2023-02-18 16:14:41,448 INFO L226 Difference]: Without dead ends: 780 [2023-02-18 16:14:41,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 16:14:41,448 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:41,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 448 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:14:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-02-18 16:14:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 736. [2023-02-18 16:14:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2023-02-18 16:14:41,996 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 43 [2023-02-18 16:14:41,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:41,997 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2023-02-18 16:14:41,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2023-02-18 16:14:41,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:14:41,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:41,997 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:42,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-02-18 16:14:42,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-02-18 16:14:42,198 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:42,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1525148816, now seen corresponding path program 81 times [2023-02-18 16:14:42,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:42,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268596559] [2023-02-18 16:14:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:42,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:14:42,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:42,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268596559] [2023-02-18 16:14:42,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268596559] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:42,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425321000] [2023-02-18 16:14:42,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:14:42,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:42,619 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:42,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-02-18 16:14:42,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 16:14:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:42,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:14:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:14:43,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:14:43,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425321000] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:43,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:43,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 53 [2023-02-18 16:14:43,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030534808] [2023-02-18 16:14:43,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 16:14:43,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 16:14:43,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 16:14:43,481 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:46,635 INFO L93 Difference]: Finished difference Result 1317 states and 1400 transitions. [2023-02-18 16:14:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 16:14:46,635 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 16:14:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:46,636 INFO L225 Difference]: With dead ends: 1317 [2023-02-18 16:14:46,637 INFO L226 Difference]: Without dead ends: 1308 [2023-02-18 16:14:46,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 32 SyntacticMatches, 37 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=6932, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 16:14:46,637 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 371 mSDsluCounter, 6178 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 6363 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:46,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 6363 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:14:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-02-18 16:14:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 745. [2023-02-18 16:14:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.096774193548387) internal successors, (816), 744 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 816 transitions. [2023-02-18 16:14:47,163 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 816 transitions. Word has length 44 [2023-02-18 16:14:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:47,163 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 816 transitions. [2023-02-18 16:14:47,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 816 transitions. [2023-02-18 16:14:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:14:47,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:47,164 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:47,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-02-18 16:14:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:47,365 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 39040176, now seen corresponding path program 82 times [2023-02-18 16:14:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:47,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074902819] [2023-02-18 16:14:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:14:47,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:47,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074902819] [2023-02-18 16:14:47,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074902819] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:47,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463180096] [2023-02-18 16:14:47,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:14:47,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:47,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:47,751 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:47,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-02-18 16:14:47,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:14:47,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:14:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:14:48,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:14:48,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463180096] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:48,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:48,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2023-02-18 16:14:48,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012428305] [2023-02-18 16:14:48,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:48,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 16:14:48,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:48,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 16:14:48,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2424, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:14:48,562 INFO L87 Difference]: Start difference. First operand 745 states and 816 transitions. Second operand has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:51,328 INFO L93 Difference]: Finished difference Result 1118 states and 1188 transitions. [2023-02-18 16:14:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 16:14:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 16:14:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:51,330 INFO L225 Difference]: With dead ends: 1118 [2023-02-18 16:14:51,330 INFO L226 Difference]: Without dead ends: 1089 [2023-02-18 16:14:51,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 34 SyntacticMatches, 35 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=349, Invalid=6131, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 16:14:51,331 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 283 mSDsluCounter, 4885 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 5042 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:51,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 5042 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:14:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2023-02-18 16:14:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 736. [2023-02-18 16:14:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2023-02-18 16:14:51,842 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 44 [2023-02-18 16:14:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:51,842 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2023-02-18 16:14:51,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2023-02-18 16:14:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:14:51,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:51,843 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:51,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2023-02-18 16:14:52,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:52,043 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash 888591216, now seen corresponding path program 83 times [2023-02-18 16:14:52,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:52,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782607040] [2023-02-18 16:14:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:52,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:14:52,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782607040] [2023-02-18 16:14:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782607040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144077791] [2023-02-18 16:14:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:14:52,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:52,437 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:52,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-02-18 16:14:52,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:14:52,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:14:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:14:52,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:14:53,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144077791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:53,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:53,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2023-02-18 16:14:53,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541950784] [2023-02-18 16:14:53,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:53,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:14:53,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:14:53,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:14:53,206 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:55,391 INFO L93 Difference]: Finished difference Result 977 states and 1046 transitions. [2023-02-18 16:14:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:14:55,391 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 16:14:55,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:55,393 INFO L225 Difference]: With dead ends: 977 [2023-02-18 16:14:55,393 INFO L226 Difference]: Without dead ends: 947 [2023-02-18 16:14:55,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 30 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=343, Invalid=5509, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 16:14:55,398 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 244 mSDsluCounter, 3241 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:55,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 3364 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:14:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-02-18 16:14:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 725. [2023-02-18 16:14:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.0966850828729282) internal successors, (794), 724 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 794 transitions. [2023-02-18 16:14:55,905 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 794 transitions. Word has length 44 [2023-02-18 16:14:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:55,905 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 794 transitions. [2023-02-18 16:14:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 794 transitions. [2023-02-18 16:14:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:14:55,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:55,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:55,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-02-18 16:14:56,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:56,107 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash -359009104, now seen corresponding path program 84 times [2023-02-18 16:14:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:56,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230812001] [2023-02-18 16:14:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:14:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:56,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230812001] [2023-02-18 16:14:56,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230812001] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:56,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639074463] [2023-02-18 16:14:56,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:14:56,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:56,415 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:56,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-02-18 16:14:56,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:14:56,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:14:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:14:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:14:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:14:56,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:14:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:14:57,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639074463] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:14:57,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:14:57,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2023-02-18 16:14:57,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268748641] [2023-02-18 16:14:57,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:14:57,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 16:14:57,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:14:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 16:14:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:14:57,115 INFO L87 Difference]: Start difference. First operand 725 states and 794 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:58,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:58,916 INFO L93 Difference]: Finished difference Result 869 states and 937 transitions. [2023-02-18 16:14:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 16:14:58,916 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 16:14:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:58,917 INFO L225 Difference]: With dead ends: 869 [2023-02-18 16:14:58,917 INFO L226 Difference]: Without dead ends: 838 [2023-02-18 16:14:58,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 26 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=337, Invalid=4919, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 16:14:58,918 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 190 mSDsluCounter, 2576 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:58,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 2665 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:14:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-02-18 16:14:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 712. [2023-02-18 16:14:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.0970464135021096) internal successors, (780), 711 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 780 transitions. [2023-02-18 16:14:59,422 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 780 transitions. Word has length 44 [2023-02-18 16:14:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:59,423 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 780 transitions. [2023-02-18 16:14:59,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:14:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 780 transitions. [2023-02-18 16:14:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:14:59,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:59,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:14:59,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2023-02-18 16:14:59,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:59,624 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1685351568, now seen corresponding path program 85 times [2023-02-18 16:14:59,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:59,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869893883] [2023-02-18 16:14:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:59,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:14:59,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:14:59,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869893883] [2023-02-18 16:14:59,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869893883] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:14:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129336534] [2023-02-18 16:14:59,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:14:59,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:14:59,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:14:59,905 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:14:59,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-02-18 16:14:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:14:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:14:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:15:00,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:15:00,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129336534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:00,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:00,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2023-02-18 16:15:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286458083] [2023-02-18 16:15:00,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:00,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 16:15:00,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 16:15:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 16:15:00,525 INFO L87 Difference]: Start difference. First operand 712 states and 780 transitions. Second operand has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:01,872 INFO L93 Difference]: Finished difference Result 780 states and 847 transitions. [2023-02-18 16:15:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 16:15:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 16:15:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:01,873 INFO L225 Difference]: With dead ends: 780 [2023-02-18 16:15:01,873 INFO L226 Difference]: Without dead ends: 748 [2023-02-18 16:15:01,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 22 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=331, Invalid=4361, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 16:15:01,873 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 142 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:01,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1462 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:15:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-02-18 16:15:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 697. [2023-02-18 16:15:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.0977011494252873) internal successors, (764), 696 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 764 transitions. [2023-02-18 16:15:02,380 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 764 transitions. Word has length 44 [2023-02-18 16:15:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:02,380 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 764 transitions. [2023-02-18 16:15:02,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 764 transitions. [2023-02-18 16:15:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:15:02,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:02,382 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:02,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-02-18 16:15:02,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:02,587 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2111163216, now seen corresponding path program 86 times [2023-02-18 16:15:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:02,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850058353] [2023-02-18 16:15:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:15:02,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:02,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850058353] [2023-02-18 16:15:02,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850058353] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:02,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290668158] [2023-02-18 16:15:02,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:15:02,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:02,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:02,828 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:02,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-02-18 16:15:02,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:15:02,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 16:15:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:15:03,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:15:03,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290668158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:03,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:03,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 43 [2023-02-18 16:15:03,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014077345] [2023-02-18 16:15:03,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 16:15:03,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 16:15:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 16:15:03,406 INFO L87 Difference]: Start difference. First operand 697 states and 764 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:04,472 INFO L93 Difference]: Finished difference Result 746 states and 815 transitions. [2023-02-18 16:15:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:15:04,473 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 16:15:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:04,474 INFO L225 Difference]: With dead ends: 746 [2023-02-18 16:15:04,474 INFO L226 Difference]: Without dead ends: 740 [2023-02-18 16:15:04,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=3835, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 16:15:04,474 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 138 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:04,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 583 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:15:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2023-02-18 16:15:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 711. [2023-02-18 16:15:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0985915492957747) internal successors, (780), 710 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 780 transitions. [2023-02-18 16:15:04,997 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 780 transitions. Word has length 44 [2023-02-18 16:15:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:04,997 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 780 transitions. [2023-02-18 16:15:04,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 780 transitions. [2023-02-18 16:15:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:15:04,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:04,998 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:05,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-02-18 16:15:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2023-02-18 16:15:05,201 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 627664406, now seen corresponding path program 87 times [2023-02-18 16:15:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:05,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749890007] [2023-02-18 16:15:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:15:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:05,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749890007] [2023-02-18 16:15:05,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749890007] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:05,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061186981] [2023-02-18 16:15:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:15:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:05,489 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:05,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-02-18 16:15:05,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 16:15:05,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 16:15:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:15:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:15:06,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061186981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:06,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:06,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2023-02-18 16:15:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650593696] [2023-02-18 16:15:06,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:06,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 16:15:06,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 16:15:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 16:15:06,682 INFO L87 Difference]: Start difference. First operand 711 states and 780 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:11,261 INFO L93 Difference]: Finished difference Result 1257 states and 1344 transitions. [2023-02-18 16:15:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-02-18 16:15:11,261 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-18 16:15:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:11,263 INFO L225 Difference]: With dead ends: 1257 [2023-02-18 16:15:11,263 INFO L226 Difference]: Without dead ends: 1207 [2023-02-18 16:15:11,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7039 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5974, Invalid=23782, Unknown=0, NotChecked=0, Total=29756 [2023-02-18 16:15:11,264 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 3481 mSDsluCounter, 2240 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 2350 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:11,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3481 Valid, 2350 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:15:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2023-02-18 16:15:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 778. [2023-02-18 16:15:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.0978120978120978) internal successors, (853), 777 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 853 transitions. [2023-02-18 16:15:11,874 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 853 transitions. Word has length 45 [2023-02-18 16:15:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:11,874 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 853 transitions. [2023-02-18 16:15:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 853 transitions. [2023-02-18 16:15:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:15:11,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:11,875 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:11,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-02-18 16:15:12,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2023-02-18 16:15:12,075 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:12,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1889550089, now seen corresponding path program 88 times [2023-02-18 16:15:12,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:12,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267440296] [2023-02-18 16:15:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:15:12,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:12,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267440296] [2023-02-18 16:15:12,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267440296] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:12,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73034801] [2023-02-18 16:15:12,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:15:12,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:12,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:12,367 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:12,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-02-18 16:15:12,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:15:12,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 16:15:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:15:12,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:15:13,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73034801] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:13,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:13,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2023-02-18 16:15:13,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708313229] [2023-02-18 16:15:13,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:13,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 16:15:13,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:13,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 16:15:13,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 16:15:13,584 INFO L87 Difference]: Start difference. First operand 778 states and 853 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:17,201 INFO L93 Difference]: Finished difference Result 1238 states and 1319 transitions. [2023-02-18 16:15:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:15:17,202 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-18 16:15:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:17,203 INFO L225 Difference]: With dead ends: 1238 [2023-02-18 16:15:17,203 INFO L226 Difference]: Without dead ends: 1213 [2023-02-18 16:15:17,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2103 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=802, Invalid=8900, Unknown=0, NotChecked=0, Total=9702 [2023-02-18 16:15:17,205 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 2694 mSDsluCounter, 6137 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 6333 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:17,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2694 Valid, 6333 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:15:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-02-18 16:15:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 784. [2023-02-18 16:15:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.0970625798212006) internal successors, (859), 783 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 859 transitions. [2023-02-18 16:15:17,810 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 859 transitions. Word has length 45 [2023-02-18 16:15:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:17,811 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 859 transitions. [2023-02-18 16:15:17,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 859 transitions. [2023-02-18 16:15:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:15:17,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:17,812 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:17,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-02-18 16:15:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:18,012 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:18,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash 579713141, now seen corresponding path program 89 times [2023-02-18 16:15:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:18,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002625371] [2023-02-18 16:15:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:15:18,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002625371] [2023-02-18 16:15:18,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002625371] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649085853] [2023-02-18 16:15:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:15:18,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:18,093 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:18,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-02-18 16:15:18,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:15:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 16:15:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:15:18,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:15:18,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649085853] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:18,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:18,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2023-02-18 16:15:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123174155] [2023-02-18 16:15:18,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:18,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 16:15:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 16:15:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-02-18 16:15:18,274 INFO L87 Difference]: Start difference. First operand 784 states and 859 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:19,312 INFO L93 Difference]: Finished difference Result 897 states and 981 transitions. [2023-02-18 16:15:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 16:15:19,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-18 16:15:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:19,314 INFO L225 Difference]: With dead ends: 897 [2023-02-18 16:15:19,314 INFO L226 Difference]: Without dead ends: 880 [2023-02-18 16:15:19,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 16:15:19,314 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 247 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:19,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 378 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:15:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2023-02-18 16:15:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 824. [2023-02-18 16:15:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.1081409477521265) internal successors, (912), 823 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 912 transitions. [2023-02-18 16:15:19,991 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 912 transitions. Word has length 45 [2023-02-18 16:15:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:19,992 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 912 transitions. [2023-02-18 16:15:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 912 transitions. [2023-02-18 16:15:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:15:19,993 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:19,993 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:19,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2023-02-18 16:15:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:20,193 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1406048364, now seen corresponding path program 90 times [2023-02-18 16:15:20,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:20,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998707169] [2023-02-18 16:15:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:15:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:20,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998707169] [2023-02-18 16:15:20,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998707169] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:20,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258088319] [2023-02-18 16:15:20,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:15:20,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:20,274 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:20,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-02-18 16:15:20,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 16:15:20,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 16:15:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:15:20,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 16:15:20,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258088319] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:20,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:20,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2023-02-18 16:15:20,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544226976] [2023-02-18 16:15:20,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:20,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 16:15:20,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 16:15:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-02-18 16:15:20,461 INFO L87 Difference]: Start difference. First operand 824 states and 912 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:21,851 INFO L93 Difference]: Finished difference Result 1384 states and 1555 transitions. [2023-02-18 16:15:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 16:15:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-18 16:15:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:21,854 INFO L225 Difference]: With dead ends: 1384 [2023-02-18 16:15:21,854 INFO L226 Difference]: Without dead ends: 1180 [2023-02-18 16:15:21,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 16:15:21,855 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 656 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:21,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 647 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:15:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2023-02-18 16:15:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 934. [2023-02-18 16:15:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2023-02-18 16:15:22,596 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 45 [2023-02-18 16:15:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:22,596 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2023-02-18 16:15:22,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2023-02-18 16:15:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:22,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:22,598 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:22,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-02-18 16:15:22,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:22,803 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2078840465, now seen corresponding path program 91 times [2023-02-18 16:15:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312348014] [2023-02-18 16:15:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:15:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312348014] [2023-02-18 16:15:23,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312348014] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823559891] [2023-02-18 16:15:23,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:15:23,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:23,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:23,277 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:23,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-02-18 16:15:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 16:15:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:15:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:15:24,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823559891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:24,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:24,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 56 [2023-02-18 16:15:24,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066105441] [2023-02-18 16:15:24,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:24,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 16:15:24,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 16:15:24,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2946, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 16:15:24,258 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:28,880 INFO L93 Difference]: Finished difference Result 1692 states and 1809 transitions. [2023-02-18 16:15:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-18 16:15:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:15:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:28,882 INFO L225 Difference]: With dead ends: 1692 [2023-02-18 16:15:28,882 INFO L226 Difference]: Without dead ends: 1683 [2023-02-18 16:15:28,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 31 SyntacticMatches, 41 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=397, Invalid=7793, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 16:15:28,883 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 397 mSDsluCounter, 7026 mSDsCounter, 0 mSdLazyCounter, 3146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 7228 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:28,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 7228 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3146 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:15:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2023-02-18 16:15:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 943. [2023-02-18 16:15:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.1093418259023355) internal successors, (1045), 942 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1045 transitions. [2023-02-18 16:15:29,638 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1045 transitions. Word has length 46 [2023-02-18 16:15:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:29,638 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1045 transitions. [2023-02-18 16:15:29,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1045 transitions. [2023-02-18 16:15:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:29,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:29,640 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:29,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2023-02-18 16:15:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2023-02-18 16:15:29,840 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2111321103, now seen corresponding path program 92 times [2023-02-18 16:15:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:29,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42804146] [2023-02-18 16:15:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:15:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42804146] [2023-02-18 16:15:30,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42804146] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877371306] [2023-02-18 16:15:30,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:15:30,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:30,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:30,284 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:30,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-02-18 16:15:30,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:15:30,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:15:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:15:30,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:15:31,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877371306] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:31,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:31,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 54 [2023-02-18 16:15:31,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033974436] [2023-02-18 16:15:31,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:31,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 16:15:31,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:31,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 16:15:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:15:31,212 INFO L87 Difference]: Start difference. First operand 943 states and 1045 transitions. Second operand has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:35,277 INFO L93 Difference]: Finished difference Result 1460 states and 1561 transitions. [2023-02-18 16:15:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 16:15:35,277 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:15:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:35,279 INFO L225 Difference]: With dead ends: 1460 [2023-02-18 16:15:35,279 INFO L226 Difference]: Without dead ends: 1430 [2023-02-18 16:15:35,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 35 SyntacticMatches, 37 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=367, Invalid=6943, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 16:15:35,280 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 309 mSDsluCounter, 5617 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 5787 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:35,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 5787 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:15:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2023-02-18 16:15:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 934. [2023-02-18 16:15:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2023-02-18 16:15:36,037 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 46 [2023-02-18 16:15:36,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:36,037 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2023-02-18 16:15:36,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2023-02-18 16:15:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:36,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:36,038 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:36,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2023-02-18 16:15:36,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2023-02-18 16:15:36,239 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:36,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1796342545, now seen corresponding path program 93 times [2023-02-18 16:15:36,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:36,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513501998] [2023-02-18 16:15:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:36,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:15:36,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:36,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513501998] [2023-02-18 16:15:36,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513501998] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:36,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885463246] [2023-02-18 16:15:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:15:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:36,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:36,638 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:36,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-02-18 16:15:36,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:15:36,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:15:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:15:37,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:15:37,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885463246] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:37,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:37,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2023-02-18 16:15:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490194887] [2023-02-18 16:15:37,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 16:15:37,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 16:15:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 16:15:37,514 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:40,936 INFO L93 Difference]: Finished difference Result 1285 states and 1385 transitions. [2023-02-18 16:15:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 16:15:40,937 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:15:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:40,938 INFO L225 Difference]: With dead ends: 1285 [2023-02-18 16:15:40,938 INFO L226 Difference]: Without dead ends: 1254 [2023-02-18 16:15:40,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 39 SyntacticMatches, 33 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=6281, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 16:15:40,939 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 264 mSDsluCounter, 4235 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 4371 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:40,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 4371 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:15:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2023-02-18 16:15:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 923. [2023-02-18 16:15:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.1095444685466378) internal successors, (1023), 922 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1023 transitions. [2023-02-18 16:15:41,697 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1023 transitions. Word has length 46 [2023-02-18 16:15:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:41,697 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1023 transitions. [2023-02-18 16:15:41,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1023 transitions. [2023-02-18 16:15:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:41,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:41,698 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:41,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2023-02-18 16:15:41,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-02-18 16:15:41,898 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -479321969, now seen corresponding path program 94 times [2023-02-18 16:15:41,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:41,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411160576] [2023-02-18 16:15:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:41,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:15:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411160576] [2023-02-18 16:15:42,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411160576] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989082580] [2023-02-18 16:15:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:15:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:42,246 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:42,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-02-18 16:15:42,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:15:42,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:42,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:15:42,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:15:42,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:15:43,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989082580] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:43,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:43,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 50 [2023-02-18 16:15:43,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355263184] [2023-02-18 16:15:43,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:43,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 16:15:43,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:43,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 16:15:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 16:15:43,018 INFO L87 Difference]: Start difference. First operand 923 states and 1023 transitions. Second operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:45,764 INFO L93 Difference]: Finished difference Result 1149 states and 1248 transitions. [2023-02-18 16:15:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 16:15:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:15:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:45,766 INFO L225 Difference]: With dead ends: 1149 [2023-02-18 16:15:45,766 INFO L226 Difference]: Without dead ends: 1117 [2023-02-18 16:15:45,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 29 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=355, Invalid=5651, Unknown=0, NotChecked=0, Total=6006 [2023-02-18 16:15:45,767 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 220 mSDsluCounter, 2978 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:45,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 3080 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:15:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2023-02-18 16:15:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 910. [2023-02-18 16:15:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.11001100110011) internal successors, (1009), 909 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1009 transitions. [2023-02-18 16:15:46,497 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1009 transitions. Word has length 46 [2023-02-18 16:15:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:46,497 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1009 transitions. [2023-02-18 16:15:46,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1009 transitions. [2023-02-18 16:15:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:46,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:46,498 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:46,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2023-02-18 16:15:46,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-02-18 16:15:46,698 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1560702865, now seen corresponding path program 95 times [2023-02-18 16:15:46,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:46,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146368804] [2023-02-18 16:15:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:46,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:15:47,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:47,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146368804] [2023-02-18 16:15:47,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146368804] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:47,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590050892] [2023-02-18 16:15:47,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:15:47,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:47,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:47,005 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:47,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-02-18 16:15:47,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 16:15:47,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:47,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:15:47,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:15:47,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:15:47,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590050892] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:47,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:47,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2023-02-18 16:15:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865958781] [2023-02-18 16:15:47,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:47,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 16:15:47,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:47,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 16:15:47,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 16:15:47,713 INFO L87 Difference]: Start difference. First operand 910 states and 1009 transitions. Second operand has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:49,846 INFO L93 Difference]: Finished difference Result 1044 states and 1142 transitions. [2023-02-18 16:15:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 16:15:49,846 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:15:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:49,847 INFO L225 Difference]: With dead ends: 1044 [2023-02-18 16:15:49,847 INFO L226 Difference]: Without dead ends: 1011 [2023-02-18 16:15:49,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 47 SyntacticMatches, 25 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=349, Invalid=5053, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 16:15:49,848 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 179 mSDsluCounter, 1763 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:49,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1831 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:15:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2023-02-18 16:15:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 895. [2023-02-18 16:15:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.110738255033557) internal successors, (993), 894 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 993 transitions. [2023-02-18 16:15:50,572 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 993 transitions. Word has length 46 [2023-02-18 16:15:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:50,572 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 993 transitions. [2023-02-18 16:15:50,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 993 transitions. [2023-02-18 16:15:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:50,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:50,573 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:50,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2023-02-18 16:15:50,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:50,773 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1236184286, now seen corresponding path program 96 times [2023-02-18 16:15:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950897666] [2023-02-18 16:15:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 16:15:50,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:50,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950897666] [2023-02-18 16:15:50,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950897666] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:50,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096179437] [2023-02-18 16:15:50,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:15:50,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:50,908 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:50,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-02-18 16:15:50,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 16:15:50,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:50,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 16:15:50,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 16:15:51,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 16:15:51,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096179437] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:51,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:51,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-18 16:15:51,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299353239] [2023-02-18 16:15:51,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:51,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:15:51,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:15:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:15:51,371 INFO L87 Difference]: Start difference. First operand 895 states and 993 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:53,165 INFO L93 Difference]: Finished difference Result 1147 states and 1264 transitions. [2023-02-18 16:15:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 16:15:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:15:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:53,167 INFO L225 Difference]: With dead ends: 1147 [2023-02-18 16:15:53,167 INFO L226 Difference]: Without dead ends: 1075 [2023-02-18 16:15:53,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1424, Invalid=5382, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 16:15:53,168 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1519 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:53,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 1203 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:15:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2023-02-18 16:15:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 986. [2023-02-18 16:15:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.099492385786802) internal successors, (1083), 985 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1083 transitions. [2023-02-18 16:15:53,954 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1083 transitions. Word has length 46 [2023-02-18 16:15:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:53,954 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1083 transitions. [2023-02-18 16:15:53,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1083 transitions. [2023-02-18 16:15:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:53,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:53,955 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:53,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2023-02-18 16:15:54,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2023-02-18 16:15:54,155 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:54,155 INFO L85 PathProgramCache]: Analyzing trace with hash 833817871, now seen corresponding path program 97 times [2023-02-18 16:15:54,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:54,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462485564] [2023-02-18 16:15:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:15:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462485564] [2023-02-18 16:15:54,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462485564] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270492179] [2023-02-18 16:15:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:15:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:54,429 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:54,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2023-02-18 16:15:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:15:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:15:54,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:15:55,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270492179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:55,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:55,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 46 [2023-02-18 16:15:55,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657680147] [2023-02-18 16:15:55,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:55,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 16:15:55,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:55,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 16:15:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 16:15:55,092 INFO L87 Difference]: Start difference. First operand 986 states and 1083 transitions. Second operand has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:15:56,988 INFO L93 Difference]: Finished difference Result 1086 states and 1186 transitions. [2023-02-18 16:15:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:15:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:15:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:15:56,990 INFO L225 Difference]: With dead ends: 1086 [2023-02-18 16:15:56,990 INFO L226 Difference]: Without dead ends: 1052 [2023-02-18 16:15:56,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 22 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=4487, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 16:15:56,990 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 142 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:15:56,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1184 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:15:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-02-18 16:15:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 981. [2023-02-18 16:15:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.1010204081632653) internal successors, (1079), 980 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1079 transitions. [2023-02-18 16:15:57,799 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1079 transitions. Word has length 46 [2023-02-18 16:15:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:15:57,799 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1079 transitions. [2023-02-18 16:15:57,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:15:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1079 transitions. [2023-02-18 16:15:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:15:57,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:15:57,800 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:15:57,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2023-02-18 16:15:58,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:58,000 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:15:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:15:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash -175659490, now seen corresponding path program 98 times [2023-02-18 16:15:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:15:58,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458285133] [2023-02-18 16:15:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:15:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:15:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 16:15:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:58,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458285133] [2023-02-18 16:15:58,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458285133] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:58,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201441439] [2023-02-18 16:15:58,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:15:58,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:58,135 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:15:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2023-02-18 16:15:58,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:15:58,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 16:15:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 16:15:58,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 16:15:58,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201441439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:58,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:58,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-18 16:15:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950032911] [2023-02-18 16:15:58,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:58,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:15:58,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:58,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:15:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:15:58,616 INFO L87 Difference]: Start difference. First operand 981 states and 1079 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:00,271 INFO L93 Difference]: Finished difference Result 1076 states and 1168 transitions. [2023-02-18 16:16:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:16:00,272 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 16:16:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:00,273 INFO L225 Difference]: With dead ends: 1076 [2023-02-18 16:16:00,273 INFO L226 Difference]: Without dead ends: 1037 [2023-02-18 16:16:00,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=362, Invalid=3060, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:16:00,273 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1071 mSDsluCounter, 2515 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:00,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 2639 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:16:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-02-18 16:16:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 981. [2023-02-18 16:16:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.0887755102040817) internal successors, (1067), 980 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1067 transitions. [2023-02-18 16:16:01,110 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1067 transitions. Word has length 46 [2023-02-18 16:16:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:01,110 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1067 transitions. [2023-02-18 16:16:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1067 transitions. [2023-02-18 16:16:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 16:16:01,111 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:01,111 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:01,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2023-02-18 16:16:01,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:01,313 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash 643092471, now seen corresponding path program 99 times [2023-02-18 16:16:01,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:01,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347877126] [2023-02-18 16:16:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:01,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:16:01,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347877126] [2023-02-18 16:16:01,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347877126] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751604032] [2023-02-18 16:16:01,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:16:01,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:01,643 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:01,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2023-02-18 16:16:01,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 16:16:01,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:01,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 16:16:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:16:02,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:16:03,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751604032] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:03,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:03,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-02-18 16:16:03,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156294848] [2023-02-18 16:16:03,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:03,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 16:16:03,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:03,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 16:16:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 16:16:03,017 INFO L87 Difference]: Start difference. First operand 981 states and 1067 transitions. Second operand has 69 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:09,564 INFO L93 Difference]: Finished difference Result 1701 states and 1808 transitions. [2023-02-18 16:16:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-02-18 16:16:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 16:16:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:09,566 INFO L225 Difference]: With dead ends: 1701 [2023-02-18 16:16:09,566 INFO L226 Difference]: Without dead ends: 1647 [2023-02-18 16:16:09,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 40 SyntacticMatches, 14 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9090 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7477, Invalid=29965, Unknown=0, NotChecked=0, Total=37442 [2023-02-18 16:16:09,568 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 4468 mSDsluCounter, 2563 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4468 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:09,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4468 Valid, 2682 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:16:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2023-02-18 16:16:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1068. [2023-02-18 16:16:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.0880974695407686) internal successors, (1161), 1067 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1161 transitions. [2023-02-18 16:16:10,479 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1161 transitions. Word has length 47 [2023-02-18 16:16:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:10,479 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1161 transitions. [2023-02-18 16:16:10,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1161 transitions. [2023-02-18 16:16:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 16:16:10,480 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:10,480 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:10,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2023-02-18 16:16:10,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:10,681 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash -81145546, now seen corresponding path program 100 times [2023-02-18 16:16:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187685685] [2023-02-18 16:16:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:16:11,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:11,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187685685] [2023-02-18 16:16:11,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187685685] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:11,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896048488] [2023-02-18 16:16:11,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:16:11,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:11,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:11,015 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2023-02-18 16:16:11,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:16:11,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 16:16:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:16:11,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:16:12,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896048488] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:12,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:12,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-02-18 16:16:12,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209303614] [2023-02-18 16:16:12,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:12,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 16:16:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 16:16:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 16:16:12,427 INFO L87 Difference]: Start difference. First operand 1068 states and 1161 transitions. Second operand has 69 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:17,842 INFO L93 Difference]: Finished difference Result 1681 states and 1781 transitions. [2023-02-18 16:16:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 16:16:17,842 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 16:16:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:17,844 INFO L225 Difference]: With dead ends: 1681 [2023-02-18 16:16:17,844 INFO L226 Difference]: Without dead ends: 1654 [2023-02-18 16:16:17,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 40 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=908, Invalid=10434, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 16:16:17,845 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 2986 mSDsluCounter, 7046 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2986 SdHoareTripleChecker+Valid, 7258 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:17,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2986 Valid, 7258 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:16:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2023-02-18 16:16:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1075. [2023-02-18 16:16:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 1.0875232774674115) internal successors, (1168), 1074 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1168 transitions. [2023-02-18 16:16:18,816 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1168 transitions. Word has length 47 [2023-02-18 16:16:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:18,816 INFO L495 AbstractCegarLoop]: Abstraction has 1075 states and 1168 transitions. [2023-02-18 16:16:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1168 transitions. [2023-02-18 16:16:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 16:16:18,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:18,817 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:18,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2023-02-18 16:16:19,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2023-02-18 16:16:19,018 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1748834856, now seen corresponding path program 101 times [2023-02-18 16:16:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:19,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187806917] [2023-02-18 16:16:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:16:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187806917] [2023-02-18 16:16:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187806917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780462330] [2023-02-18 16:16:19,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:16:19,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:19,111 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:19,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2023-02-18 16:16:19,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:16:19,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 16:16:19,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:16:19,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:16:19,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780462330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:19,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:19,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-18 16:16:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778199380] [2023-02-18 16:16:19,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:16:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:16:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2023-02-18 16:16:19,311 INFO L87 Difference]: Start difference. First operand 1075 states and 1168 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:20,702 INFO L93 Difference]: Finished difference Result 1293 states and 1403 transitions. [2023-02-18 16:16:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:16:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 16:16:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:20,704 INFO L225 Difference]: With dead ends: 1293 [2023-02-18 16:16:20,704 INFO L226 Difference]: Without dead ends: 1117 [2023-02-18 16:16:20,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=744, Invalid=1418, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:16:20,704 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 174 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:20,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 717 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:16:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2023-02-18 16:16:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1061. [2023-02-18 16:16:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 1.0849056603773586) internal successors, (1150), 1060 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1150 transitions. [2023-02-18 16:16:21,670 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1150 transitions. Word has length 47 [2023-02-18 16:16:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:21,670 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1150 transitions. [2023-02-18 16:16:21,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1150 transitions. [2023-02-18 16:16:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 16:16:21,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:21,672 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:21,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2023-02-18 16:16:21,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:21,872 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1303563445, now seen corresponding path program 102 times [2023-02-18 16:16:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:21,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572485459] [2023-02-18 16:16:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:16:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572485459] [2023-02-18 16:16:21,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572485459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141595052] [2023-02-18 16:16:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:16:21,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:21,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:21,968 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:21,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2023-02-18 16:16:22,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 16:16:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 16:16:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:16:22,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:16:22,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141595052] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:22,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:22,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-18 16:16:22,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557455584] [2023-02-18 16:16:22,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:22,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:16:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:16:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2023-02-18 16:16:22,170 INFO L87 Difference]: Start difference. First operand 1061 states and 1150 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:23,565 INFO L93 Difference]: Finished difference Result 1124 states and 1207 transitions. [2023-02-18 16:16:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:16:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 16:16:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:23,567 INFO L225 Difference]: With dead ends: 1124 [2023-02-18 16:16:23,567 INFO L226 Difference]: Without dead ends: 1118 [2023-02-18 16:16:23,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=744, Invalid=1418, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:16:23,567 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 108 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:23,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 689 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:16:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2023-02-18 16:16:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1062. [2023-02-18 16:16:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0848256361922715) internal successors, (1151), 1061 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1151 transitions. [2023-02-18 16:16:24,498 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1151 transitions. Word has length 47 [2023-02-18 16:16:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:24,498 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1151 transitions. [2023-02-18 16:16:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1151 transitions. [2023-02-18 16:16:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:16:24,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:24,499 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:24,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2023-02-18 16:16:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:24,700 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1852874480, now seen corresponding path program 103 times [2023-02-18 16:16:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:24,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637616840] [2023-02-18 16:16:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:16:25,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637616840] [2023-02-18 16:16:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637616840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24641147] [2023-02-18 16:16:25,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:16:25,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:25,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:25,221 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:25,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2023-02-18 16:16:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 16:16:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:16:25,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:16:26,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24641147] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:26,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:26,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 59 [2023-02-18 16:16:26,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614961655] [2023-02-18 16:16:26,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:26,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 16:16:26,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:26,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 16:16:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3281, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:16:26,297 INFO L87 Difference]: Start difference. First operand 1062 states and 1151 transitions. Second operand has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:32,001 INFO L93 Difference]: Finished difference Result 1891 states and 1995 transitions. [2023-02-18 16:16:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 16:16:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 16:16:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:32,002 INFO L225 Difference]: With dead ends: 1891 [2023-02-18 16:16:32,003 INFO L226 Difference]: Without dead ends: 1882 [2023-02-18 16:16:32,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 32 SyntacticMatches, 43 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=416, Invalid=8704, Unknown=0, NotChecked=0, Total=9120 [2023-02-18 16:16:32,003 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 421 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 3770 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 8741 SdHoareTripleChecker+Invalid, 3771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:32,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 8741 Invalid, 3771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3770 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:16:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2023-02-18 16:16:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1071. [2023-02-18 16:16:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.0850467289719625) internal successors, (1161), 1070 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1161 transitions. [2023-02-18 16:16:32,950 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1161 transitions. Word has length 48 [2023-02-18 16:16:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:32,950 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1161 transitions. [2023-02-18 16:16:32,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1161 transitions. [2023-02-18 16:16:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:16:32,951 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:32,951 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:32,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2023-02-18 16:16:33,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2023-02-18 16:16:33,156 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:33,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1196812848, now seen corresponding path program 104 times [2023-02-18 16:16:33,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:33,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042225768] [2023-02-18 16:16:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:33,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:16:33,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042225768] [2023-02-18 16:16:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042225768] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824392342] [2023-02-18 16:16:33,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:16:33,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:33,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:33,628 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:33,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2023-02-18 16:16:33,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:16:33,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 16:16:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:16:34,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:16:34,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824392342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:34,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:34,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 57 [2023-02-18 16:16:34,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207909284] [2023-02-18 16:16:34,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:34,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 16:16:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 16:16:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3052, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:16:34,628 INFO L87 Difference]: Start difference. First operand 1071 states and 1161 transitions. Second operand has 57 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:39,641 INFO L93 Difference]: Finished difference Result 1640 states and 1729 transitions. [2023-02-18 16:16:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 16:16:39,641 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 16:16:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:39,643 INFO L225 Difference]: With dead ends: 1640 [2023-02-18 16:16:39,643 INFO L226 Difference]: Without dead ends: 1609 [2023-02-18 16:16:39,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 40 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=385, Invalid=7805, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 16:16:39,643 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 334 mSDsluCounter, 6659 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 6850 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:39,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 6850 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2951 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:16:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2023-02-18 16:16:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1062. [2023-02-18 16:16:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0848256361922715) internal successors, (1151), 1061 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1151 transitions. [2023-02-18 16:16:40,601 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1151 transitions. Word has length 48 [2023-02-18 16:16:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:40,601 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1151 transitions. [2023-02-18 16:16:40,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1151 transitions. [2023-02-18 16:16:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:16:40,602 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:40,602 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:40,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2023-02-18 16:16:40,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2023-02-18 16:16:40,805 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash -976379632, now seen corresponding path program 105 times [2023-02-18 16:16:40,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:40,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853226105] [2023-02-18 16:16:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:40,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:16:41,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:41,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853226105] [2023-02-18 16:16:41,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853226105] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:41,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303963384] [2023-02-18 16:16:41,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:16:41,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:41,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:41,245 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:41,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2023-02-18 16:16:41,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 16:16:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:16:41,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:16:41,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:16:42,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303963384] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:42,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:42,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 55 [2023-02-18 16:16:42,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717876535] [2023-02-18 16:16:42,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:42,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 16:16:42,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 16:16:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2831, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 16:16:42,181 INFO L87 Difference]: Start difference. First operand 1062 states and 1151 transitions. Second operand has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:46,302 INFO L93 Difference]: Finished difference Result 1452 states and 1540 transitions. [2023-02-18 16:16:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 16:16:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 16:16:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:46,304 INFO L225 Difference]: With dead ends: 1452 [2023-02-18 16:16:46,304 INFO L226 Difference]: Without dead ends: 1420 [2023-02-18 16:16:46,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 39 SyntacticMatches, 36 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=379, Invalid=7103, Unknown=0, NotChecked=0, Total=7482 [2023-02-18 16:16:46,304 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 289 mSDsluCounter, 5276 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 5433 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:46,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 5433 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:16:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2023-02-18 16:16:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1051. [2023-02-18 16:16:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 1.0847619047619048) internal successors, (1139), 1050 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1139 transitions. [2023-02-18 16:16:47,264 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1139 transitions. Word has length 48 [2023-02-18 16:16:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:47,264 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 1139 transitions. [2023-02-18 16:16:47,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1139 transitions. [2023-02-18 16:16:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:16:47,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:47,265 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:47,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2023-02-18 16:16:47,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2023-02-18 16:16:47,465 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash -56699440, now seen corresponding path program 106 times [2023-02-18 16:16:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:47,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057873536] [2023-02-18 16:16:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:16:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:47,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057873536] [2023-02-18 16:16:47,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057873536] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:47,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554090658] [2023-02-18 16:16:47,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:16:47,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:47,853 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:47,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2023-02-18 16:16:47,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:16:47,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:47,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:16:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:16:48,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:16:48,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554090658] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:48,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:48,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2023-02-18 16:16:48,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653886217] [2023-02-18 16:16:48,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:48,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 16:16:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 16:16:48,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 16:16:48,702 INFO L87 Difference]: Start difference. First operand 1051 states and 1139 transitions. Second operand has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:52,103 INFO L93 Difference]: Finished difference Result 1305 states and 1392 transitions. [2023-02-18 16:16:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 16:16:52,104 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 16:16:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:52,105 INFO L225 Difference]: With dead ends: 1305 [2023-02-18 16:16:52,105 INFO L226 Difference]: Without dead ends: 1272 [2023-02-18 16:16:52,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 43 SyntacticMatches, 32 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=373, Invalid=6433, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 16:16:52,105 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 240 mSDsluCounter, 3916 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4039 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:52,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4039 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2086 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:16:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2023-02-18 16:16:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1038. [2023-02-18 16:16:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.0848601735776278) internal successors, (1125), 1037 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1125 transitions. [2023-02-18 16:16:53,048 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1125 transitions. Word has length 48 [2023-02-18 16:16:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:53,048 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1125 transitions. [2023-02-18 16:16:53,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1125 transitions. [2023-02-18 16:16:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:16:53,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:53,049 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:53,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2023-02-18 16:16:53,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:53,249 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash -693772016, now seen corresponding path program 107 times [2023-02-18 16:16:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:53,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613691694] [2023-02-18 16:16:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:53,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:16:53,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:53,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613691694] [2023-02-18 16:16:53,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613691694] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:53,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399913189] [2023-02-18 16:16:53,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:16:53,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:53,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:53,601 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:53,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2023-02-18 16:16:53,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 16:16:53,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:16:53,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:16:54,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:16:54,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399913189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:54,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:54,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 51 [2023-02-18 16:16:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271474626] [2023-02-18 16:16:54,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:54,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 16:16:54,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 16:16:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2413, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:16:54,393 INFO L87 Difference]: Start difference. First operand 1038 states and 1125 transitions. Second operand has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:16:57,044 INFO L93 Difference]: Finished difference Result 1191 states and 1277 transitions. [2023-02-18 16:16:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 16:16:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 16:16:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:16:57,045 INFO L225 Difference]: With dead ends: 1191 [2023-02-18 16:16:57,046 INFO L226 Difference]: Without dead ends: 1157 [2023-02-18 16:16:57,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 47 SyntacticMatches, 28 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=5795, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 16:16:57,046 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 195 mSDsluCounter, 2493 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:16:57,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 2582 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:16:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-02-18 16:16:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1023. [2023-02-18 16:16:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.0851272015655578) internal successors, (1109), 1022 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1109 transitions. [2023-02-18 16:16:57,970 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1109 transitions. Word has length 48 [2023-02-18 16:16:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:16:57,970 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1109 transitions. [2023-02-18 16:16:57,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:16:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1109 transitions. [2023-02-18 16:16:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:16:57,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:16:57,971 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:16:57,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2023-02-18 16:16:58,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2023-02-18 16:16:58,172 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:16:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:16:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 368678352, now seen corresponding path program 108 times [2023-02-18 16:16:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:16:58,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984529945] [2023-02-18 16:16:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:16:58,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:16:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:16:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:16:58,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:16:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984529945] [2023-02-18 16:16:58,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984529945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:16:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070144358] [2023-02-18 16:16:58,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:16:58,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:16:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:16:58,481 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:16:58,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2023-02-18 16:16:58,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:16:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:16:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:16:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:16:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:16:58,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:16:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:16:59,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070144358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:16:59,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:16:59,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 49 [2023-02-18 16:16:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505783053] [2023-02-18 16:16:59,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:16:59,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:16:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:16:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:16:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2216, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:16:59,251 INFO L87 Difference]: Start difference. First operand 1023 states and 1109 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:01,260 INFO L93 Difference]: Finished difference Result 1095 states and 1180 transitions. [2023-02-18 16:17:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 16:17:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 16:17:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:01,261 INFO L225 Difference]: With dead ends: 1095 [2023-02-18 16:17:01,261 INFO L226 Difference]: Without dead ends: 1060 [2023-02-18 16:17:01,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 25 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=5189, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 16:17:01,261 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 144 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:01,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1471 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:17:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-02-18 16:17:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1006. [2023-02-18 16:17:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0855721393034825) internal successors, (1091), 1005 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1091 transitions. [2023-02-18 16:17:02,198 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1091 transitions. Word has length 48 [2023-02-18 16:17:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:02,198 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 1091 transitions. [2023-02-18 16:17:02,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1091 transitions. [2023-02-18 16:17:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:17:02,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:02,199 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:02,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2023-02-18 16:17:02,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2023-02-18 16:17:02,400 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -937942768, now seen corresponding path program 109 times [2023-02-18 16:17:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554559952] [2023-02-18 16:17:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:17:02,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:02,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554559952] [2023-02-18 16:17:02,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554559952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:02,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492243362] [2023-02-18 16:17:02,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:17:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:02,672 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:02,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2023-02-18 16:17:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:17:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:17:03,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:17:03,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492243362] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:03,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:03,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 47 [2023-02-18 16:17:03,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583696678] [2023-02-18 16:17:03,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:03,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 16:17:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 16:17:03,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:17:03,348 INFO L87 Difference]: Start difference. First operand 1006 states and 1091 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:05,000 INFO L93 Difference]: Finished difference Result 1058 states and 1145 transitions. [2023-02-18 16:17:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 16:17:05,003 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 16:17:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:05,003 INFO L225 Difference]: With dead ends: 1058 [2023-02-18 16:17:05,004 INFO L226 Difference]: Without dead ends: 1052 [2023-02-18 16:17:05,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 55 SyntacticMatches, 20 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=355, Invalid=4615, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 16:17:05,004 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:05,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 659 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:17:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-02-18 16:17:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1021. [2023-02-18 16:17:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.0862745098039215) internal successors, (1108), 1020 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1108 transitions. [2023-02-18 16:17:05,961 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1108 transitions. Word has length 48 [2023-02-18 16:17:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:05,961 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1108 transitions. [2023-02-18 16:17:05,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1108 transitions. [2023-02-18 16:17:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 16:17:05,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:05,962 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:05,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2023-02-18 16:17:06,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2023-02-18 16:17:06,163 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -941896586, now seen corresponding path program 110 times [2023-02-18 16:17:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804665952] [2023-02-18 16:17:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:17:06,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804665952] [2023-02-18 16:17:06,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804665952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695675318] [2023-02-18 16:17:06,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:17:06,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:06,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:06,543 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:06,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2023-02-18 16:17:06,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:17:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:17:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 16:17:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:17:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:17:08,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695675318] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:08,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:08,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 74 [2023-02-18 16:17:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786651163] [2023-02-18 16:17:08,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-18 16:17:08,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-18 16:17:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5186, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 16:17:08,129 INFO L87 Difference]: Start difference. First operand 1021 states and 1108 transitions. Second operand has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:16,215 INFO L93 Difference]: Finished difference Result 1805 states and 1913 transitions. [2023-02-18 16:17:16,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2023-02-18 16:17:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-18 16:17:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:16,217 INFO L225 Difference]: With dead ends: 1805 [2023-02-18 16:17:16,217 INFO L226 Difference]: Without dead ends: 1749 [2023-02-18 16:17:16,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11539 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9229, Invalid=37211, Unknown=0, NotChecked=0, Total=46440 [2023-02-18 16:17:16,219 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 4767 mSDsluCounter, 3077 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4767 SdHoareTripleChecker+Valid, 3204 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:16,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4767 Valid, 3204 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:17:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2023-02-18 16:17:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1109. [2023-02-18 16:17:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 1.0857400722021662) internal successors, (1203), 1108 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1203 transitions. [2023-02-18 16:17:17,289 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1203 transitions. Word has length 49 [2023-02-18 16:17:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:17,289 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 1203 transitions. [2023-02-18 16:17:17,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1203 transitions. [2023-02-18 16:17:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 16:17:17,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:17,290 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:17,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2023-02-18 16:17:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2023-02-18 16:17:17,490 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1918438633, now seen corresponding path program 111 times [2023-02-18 16:17:17,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:17,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846778684] [2023-02-18 16:17:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:17:17,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846778684] [2023-02-18 16:17:17,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846778684] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969487349] [2023-02-18 16:17:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:17:17,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:17,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:17,861 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:17,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2023-02-18 16:17:17,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 16:17:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:17:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 16:17:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:17:18,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:17:19,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969487349] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:19,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:19,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 74 [2023-02-18 16:17:19,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778464963] [2023-02-18 16:17:19,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:19,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-18 16:17:19,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-18 16:17:19,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5186, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 16:17:19,440 INFO L87 Difference]: Start difference. First operand 1109 states and 1203 transitions. Second operand has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:26,005 INFO L93 Difference]: Finished difference Result 1784 states and 1885 transitions. [2023-02-18 16:17:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 16:17:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-18 16:17:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:26,007 INFO L225 Difference]: With dead ends: 1784 [2023-02-18 16:17:26,007 INFO L226 Difference]: Without dead ends: 1756 [2023-02-18 16:17:26,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1020, Invalid=12090, Unknown=0, NotChecked=0, Total=13110 [2023-02-18 16:17:26,008 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 3625 mSDsluCounter, 8346 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3625 SdHoareTripleChecker+Valid, 8574 SdHoareTripleChecker+Invalid, 3281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:26,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3625 Valid, 8574 Invalid, 3281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3165 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:17:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2023-02-18 16:17:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1116. [2023-02-18 16:17:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 1.0852017937219731) internal successors, (1210), 1115 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1210 transitions. [2023-02-18 16:17:27,126 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1210 transitions. Word has length 49 [2023-02-18 16:17:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:27,126 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 1210 transitions. [2023-02-18 16:17:27,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1210 transitions. [2023-02-18 16:17:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 16:17:27,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:27,127 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:27,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2023-02-18 16:17:27,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:27,329 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1705158635, now seen corresponding path program 112 times [2023-02-18 16:17:27,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:27,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234957673] [2023-02-18 16:17:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:17:27,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234957673] [2023-02-18 16:17:27,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234957673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722130545] [2023-02-18 16:17:27,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:17:27,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:27,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:27,446 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:27,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2023-02-18 16:17:27,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:17:27,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:17:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 16:17:27,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:17:27,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:17:27,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722130545] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:27,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:27,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2023-02-18 16:17:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937713499] [2023-02-18 16:17:27,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 16:17:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 16:17:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:17:27,660 INFO L87 Difference]: Start difference. First operand 1116 states and 1210 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:29,516 INFO L93 Difference]: Finished difference Result 1249 states and 1353 transitions. [2023-02-18 16:17:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 16:17:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-18 16:17:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:29,517 INFO L225 Difference]: With dead ends: 1249 [2023-02-18 16:17:29,517 INFO L226 Difference]: Without dead ends: 1231 [2023-02-18 16:17:29,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 22 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 16:17:29,518 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 454 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:29,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 347 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:17:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2023-02-18 16:17:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1162. [2023-02-18 16:17:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.0947459086993971) internal successors, (1271), 1161 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1271 transitions. [2023-02-18 16:17:30,726 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1271 transitions. Word has length 49 [2023-02-18 16:17:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:30,726 INFO L495 AbstractCegarLoop]: Abstraction has 1162 states and 1271 transitions. [2023-02-18 16:17:30,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1271 transitions. [2023-02-18 16:17:30,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 16:17:30,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:30,727 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:30,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2023-02-18 16:17:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:30,927 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1570091816, now seen corresponding path program 113 times [2023-02-18 16:17:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:30,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734101812] [2023-02-18 16:17:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:17:31,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734101812] [2023-02-18 16:17:31,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734101812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412208018] [2023-02-18 16:17:31,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:17:31,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:31,024 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:31,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2023-02-18 16:17:31,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:17:31,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:17:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 16:17:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:17:31,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:17:31,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412208018] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:31,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:31,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2023-02-18 16:17:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725968158] [2023-02-18 16:17:31,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 16:17:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 16:17:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:17:31,236 INFO L87 Difference]: Start difference. First operand 1162 states and 1271 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:33,654 INFO L93 Difference]: Finished difference Result 1857 states and 2062 transitions. [2023-02-18 16:17:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 16:17:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-18 16:17:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:33,655 INFO L225 Difference]: With dead ends: 1857 [2023-02-18 16:17:33,655 INFO L226 Difference]: Without dead ends: 1607 [2023-02-18 16:17:33,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 22 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 16:17:33,656 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 841 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:33,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 587 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:17:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2023-02-18 16:17:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1304. [2023-02-18 16:17:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 1.0959324635456638) internal successors, (1428), 1303 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1428 transitions. [2023-02-18 16:17:34,963 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1428 transitions. Word has length 49 [2023-02-18 16:17:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:34,963 INFO L495 AbstractCegarLoop]: Abstraction has 1304 states and 1428 transitions. [2023-02-18 16:17:34,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1428 transitions. [2023-02-18 16:17:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:17:34,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:34,964 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:34,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2023-02-18 16:17:35,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2023-02-18 16:17:35,165 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1320581967, now seen corresponding path program 114 times [2023-02-18 16:17:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:35,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795139005] [2023-02-18 16:17:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:17:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:35,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795139005] [2023-02-18 16:17:35,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795139005] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:35,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259941372] [2023-02-18 16:17:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:17:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:35,732 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:35,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2023-02-18 16:17:35,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-18 16:17:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:17:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 16:17:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:17:36,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:17:36,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259941372] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:36,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:36,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 62 [2023-02-18 16:17:36,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917923829] [2023-02-18 16:17:36,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:36,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 16:17:36,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 16:17:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3634, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 16:17:36,969 INFO L87 Difference]: Start difference. First operand 1304 states and 1428 transitions. Second operand has 62 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:45,309 INFO L93 Difference]: Finished difference Result 2358 states and 2500 transitions. [2023-02-18 16:17:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 16:17:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:17:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:45,311 INFO L225 Difference]: With dead ends: 2358 [2023-02-18 16:17:45,311 INFO L226 Difference]: Without dead ends: 2349 [2023-02-18 16:17:45,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 32 SyntacticMatches, 46 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=435, Invalid=9665, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 16:17:45,312 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 447 mSDsluCounter, 8888 mSDsCounter, 0 mSdLazyCounter, 3783 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 9124 SdHoareTripleChecker+Invalid, 3784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:45,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 9124 Invalid, 3784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3783 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 16:17:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2023-02-18 16:17:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1313. [2023-02-18 16:17:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.0960365853658536) internal successors, (1438), 1312 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1438 transitions. [2023-02-18 16:17:46,647 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1438 transitions. Word has length 50 [2023-02-18 16:17:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:46,647 INFO L495 AbstractCegarLoop]: Abstraction has 1313 states and 1438 transitions. [2023-02-18 16:17:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1438 transitions. [2023-02-18 16:17:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:17:46,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:46,648 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:46,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2023-02-18 16:17:46,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2023-02-18 16:17:46,849 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash -971861649, now seen corresponding path program 115 times [2023-02-18 16:17:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604721712] [2023-02-18 16:17:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:46,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:17:47,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604721712] [2023-02-18 16:17:47,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604721712] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699343153] [2023-02-18 16:17:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:17:47,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:47,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:47,397 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:47,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2023-02-18 16:17:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 16:17:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:17:48,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:17:48,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699343153] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:48,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:48,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 60 [2023-02-18 16:17:48,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501009805] [2023-02-18 16:17:48,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:48,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 16:17:48,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 16:17:48,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3393, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 16:17:48,514 INFO L87 Difference]: Start difference. First operand 1313 states and 1438 transitions. Second operand has 60 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:17:56,171 INFO L93 Difference]: Finished difference Result 2070 states and 2194 transitions. [2023-02-18 16:17:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 16:17:56,171 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:17:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:17:56,173 INFO L225 Difference]: With dead ends: 2070 [2023-02-18 16:17:56,173 INFO L226 Difference]: Without dead ends: 2038 [2023-02-18 16:17:56,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 35 SyntacticMatches, 43 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=403, Invalid=8717, Unknown=0, NotChecked=0, Total=9120 [2023-02-18 16:17:56,174 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 352 mSDsluCounter, 7584 mSDsCounter, 0 mSdLazyCounter, 3454 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 7788 SdHoareTripleChecker+Invalid, 3455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:17:56,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 7788 Invalid, 3455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3454 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:17:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2023-02-18 16:17:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1304. [2023-02-18 16:17:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 1.0959324635456638) internal successors, (1428), 1303 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1428 transitions. [2023-02-18 16:17:57,508 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1428 transitions. Word has length 50 [2023-02-18 16:17:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:17:57,508 INFO L495 AbstractCegarLoop]: Abstraction has 1304 states and 1428 transitions. [2023-02-18 16:17:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:17:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1428 transitions. [2023-02-18 16:17:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:17:57,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:17:57,509 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:17:57,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2023-02-18 16:17:57,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2023-02-18 16:17:57,709 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:17:57,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:17:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1931235633, now seen corresponding path program 116 times [2023-02-18 16:17:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:17:57,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212587632] [2023-02-18 16:17:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:17:57,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:17:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:17:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:17:58,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:17:58,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212587632] [2023-02-18 16:17:58,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212587632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:17:58,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860966874] [2023-02-18 16:17:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:17:58,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:17:58,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:17:58,199 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:17:58,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2023-02-18 16:17:58,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:17:58,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:17:58,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 16:17:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:17:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:17:58,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:17:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:17:59,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860966874] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:17:59,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:17:59,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2023-02-18 16:17:59,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060587281] [2023-02-18 16:17:59,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:17:59,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 16:17:59,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:17:59,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 16:17:59,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3160, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 16:17:59,260 INFO L87 Difference]: Start difference. First operand 1304 states and 1428 transitions. Second operand has 58 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:05,569 INFO L93 Difference]: Finished difference Result 1842 states and 1965 transitions. [2023-02-18 16:18:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 16:18:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:18:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:05,571 INFO L225 Difference]: With dead ends: 1842 [2023-02-18 16:18:05,571 INFO L226 Difference]: Without dead ends: 1809 [2023-02-18 16:18:05,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 39 SyntacticMatches, 39 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=397, Invalid=7975, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 16:18:05,572 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 316 mSDsluCounter, 6141 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 6311 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:05,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 6311 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2978 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:18:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2023-02-18 16:18:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1293. [2023-02-18 16:18:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 1.0959752321981424) internal successors, (1416), 1292 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1416 transitions. [2023-02-18 16:18:06,929 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1416 transitions. Word has length 50 [2023-02-18 16:18:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:06,930 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1416 transitions. [2023-02-18 16:18:06,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1416 transitions. [2023-02-18 16:18:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:18:06,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:06,931 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:06,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2023-02-18 16:18:07,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2023-02-18 16:18:07,131 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash 515890671, now seen corresponding path program 117 times [2023-02-18 16:18:07,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:07,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749477037] [2023-02-18 16:18:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:07,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:18:07,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:07,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749477037] [2023-02-18 16:18:07,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749477037] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:07,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684934397] [2023-02-18 16:18:07,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:18:07,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:07,569 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:07,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2023-02-18 16:18:07,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:18:07,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:18:07,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:18:08,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:18:08,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684934397] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:08,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:18:08,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 56 [2023-02-18 16:18:08,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288339493] [2023-02-18 16:18:08,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:08,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 16:18:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:08,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 16:18:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 16:18:08,538 INFO L87 Difference]: Start difference. First operand 1293 states and 1416 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:13,772 INFO L93 Difference]: Finished difference Result 1661 states and 1783 transitions. [2023-02-18 16:18:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-18 16:18:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:18:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:13,774 INFO L225 Difference]: With dead ends: 1661 [2023-02-18 16:18:13,774 INFO L226 Difference]: Without dead ends: 1627 [2023-02-18 16:18:13,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 43 SyntacticMatches, 35 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=391, Invalid=7265, Unknown=0, NotChecked=0, Total=7656 [2023-02-18 16:18:13,774 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 270 mSDsluCounter, 4333 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 4469 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:13,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 4469 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:18:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2023-02-18 16:18:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1280. [2023-02-18 16:18:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.096168881939015) internal successors, (1402), 1279 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1402 transitions. [2023-02-18 16:18:15,113 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1402 transitions. Word has length 50 [2023-02-18 16:18:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:15,113 INFO L495 AbstractCegarLoop]: Abstraction has 1280 states and 1402 transitions. [2023-02-18 16:18:15,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1402 transitions. [2023-02-18 16:18:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:18:15,114 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:15,114 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:15,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:15,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2023-02-18 16:18:15,316 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2045370959, now seen corresponding path program 118 times [2023-02-18 16:18:15,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:15,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309950729] [2023-02-18 16:18:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:18:15,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:15,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309950729] [2023-02-18 16:18:15,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309950729] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:15,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45417422] [2023-02-18 16:18:15,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:18:15,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:15,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:15,715 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:15,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2023-02-18 16:18:15,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:18:15,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:15,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:18:15,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:18:16,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:18:16,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45417422] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:16,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:18:16,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 54 [2023-02-18 16:18:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789289403] [2023-02-18 16:18:16,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:16,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 16:18:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 16:18:16,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2718, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:18:16,628 INFO L87 Difference]: Start difference. First operand 1280 states and 1402 transitions. Second operand has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:20,822 INFO L93 Difference]: Finished difference Result 1519 states and 1640 transitions. [2023-02-18 16:18:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 16:18:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:18:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:20,824 INFO L225 Difference]: With dead ends: 1519 [2023-02-18 16:18:20,824 INFO L226 Difference]: Without dead ends: 1484 [2023-02-18 16:18:20,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 47 SyntacticMatches, 31 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=6587, Unknown=0, NotChecked=0, Total=6972 [2023-02-18 16:18:20,825 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 220 mSDsluCounter, 3140 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:20,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 3242 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:18:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2023-02-18 16:18:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1265. [2023-02-18 16:18:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.0965189873417722) internal successors, (1386), 1264 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1386 transitions. [2023-02-18 16:18:22,143 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1386 transitions. Word has length 50 [2023-02-18 16:18:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:22,143 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1386 transitions. [2023-02-18 16:18:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1386 transitions. [2023-02-18 16:18:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:18:22,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:22,144 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:22,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2023-02-18 16:18:22,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2023-02-18 16:18:22,346 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2122831249, now seen corresponding path program 119 times [2023-02-18 16:18:22,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:22,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278889794] [2023-02-18 16:18:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:18:22,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278889794] [2023-02-18 16:18:22,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278889794] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004342062] [2023-02-18 16:18:22,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:18:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:22,730 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:22,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2023-02-18 16:18:22,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 16:18:22,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:18:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:18:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:18:23,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004342062] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:23,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:18:23,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 52 [2023-02-18 16:18:23,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314666001] [2023-02-18 16:18:23,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:23,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 16:18:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 16:18:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2509, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 16:18:23,574 INFO L87 Difference]: Start difference. First operand 1265 states and 1386 transitions. Second operand has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:26,958 INFO L93 Difference]: Finished difference Result 1408 states and 1528 transitions. [2023-02-18 16:18:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 16:18:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:18:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:26,959 INFO L225 Difference]: With dead ends: 1408 [2023-02-18 16:18:26,959 INFO L226 Difference]: Without dead ends: 1372 [2023-02-18 16:18:26,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 27 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=379, Invalid=5941, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 16:18:26,960 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 174 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:26,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2067 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:18:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2023-02-18 16:18:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1248. [2023-02-18 16:18:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.0970328789093826) internal successors, (1368), 1247 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1368 transitions. [2023-02-18 16:18:28,258 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1368 transitions. Word has length 50 [2023-02-18 16:18:28,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:28,258 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 1368 transitions. [2023-02-18 16:18:28,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1368 transitions. [2023-02-18 16:18:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:18:28,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:28,259 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:28,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2023-02-18 16:18:28,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:28,461 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash -539159010, now seen corresponding path program 120 times [2023-02-18 16:18:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952948052] [2023-02-18 16:18:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 16:18:28,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952948052] [2023-02-18 16:18:28,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952948052] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410322924] [2023-02-18 16:18:28,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:18:28,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:28,631 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:28,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2023-02-18 16:18:28,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 16:18:28,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:28,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 16:18:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 16:18:28,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 16:18:29,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410322924] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:29,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:18:29,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-02-18 16:18:29,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935388500] [2023-02-18 16:18:29,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:18:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:18:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:18:29,194 INFO L87 Difference]: Start difference. First operand 1248 states and 1368 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:32,106 INFO L93 Difference]: Finished difference Result 1557 states and 1699 transitions. [2023-02-18 16:18:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 16:18:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:18:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:32,107 INFO L225 Difference]: With dead ends: 1557 [2023-02-18 16:18:32,107 INFO L226 Difference]: Without dead ends: 1476 [2023-02-18 16:18:32,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2007, Invalid=7695, Unknown=0, NotChecked=0, Total=9702 [2023-02-18 16:18:32,108 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1693 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:32,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1693 Valid, 1437 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:18:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2023-02-18 16:18:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1369. [2023-02-18 16:18:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 1.087719298245614) internal successors, (1488), 1368 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1488 transitions. [2023-02-18 16:18:33,530 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1488 transitions. Word has length 50 [2023-02-18 16:18:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:33,530 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 1488 transitions. [2023-02-18 16:18:33,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1488 transitions. [2023-02-18 16:18:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:18:33,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:33,531 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:33,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2023-02-18 16:18:33,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:33,732 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -134146609, now seen corresponding path program 121 times [2023-02-18 16:18:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:33,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112925610] [2023-02-18 16:18:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:33,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:18:34,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112925610] [2023-02-18 16:18:34,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112925610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992823969] [2023-02-18 16:18:34,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:18:34,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:34,043 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:34,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2023-02-18 16:18:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:18:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:18:34,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:18:34,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992823969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:34,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:18:34,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 50 [2023-02-18 16:18:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728636223] [2023-02-18 16:18:34,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 16:18:34,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 16:18:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 16:18:34,824 INFO L87 Difference]: Start difference. First operand 1369 states and 1488 transitions. Second operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:37,741 INFO L93 Difference]: Finished difference Result 1476 states and 1598 transitions. [2023-02-18 16:18:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 16:18:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:18:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:37,743 INFO L225 Difference]: With dead ends: 1476 [2023-02-18 16:18:37,743 INFO L226 Difference]: Without dead ends: 1439 [2023-02-18 16:18:37,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=373, Invalid=5327, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 16:18:37,743 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:37,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1160 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:18:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2023-02-18 16:18:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1363. [2023-02-18 16:18:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.0888399412628487) internal successors, (1483), 1362 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1483 transitions. [2023-02-18 16:18:39,159 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1483 transitions. Word has length 50 [2023-02-18 16:18:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:39,159 INFO L495 AbstractCegarLoop]: Abstraction has 1363 states and 1483 transitions. [2023-02-18 16:18:39,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1483 transitions. [2023-02-18 16:18:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:18:39,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:39,161 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:39,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2023-02-18 16:18:39,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:39,362 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1039518110, now seen corresponding path program 122 times [2023-02-18 16:18:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:39,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882883362] [2023-02-18 16:18:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:39,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 16:18:39,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:39,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882883362] [2023-02-18 16:18:39,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882883362] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:39,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049150989] [2023-02-18 16:18:39,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:18:39,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:39,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:39,535 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:39,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2023-02-18 16:18:39,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:18:39,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 16:18:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 16:18:39,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 16:18:40,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049150989] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:40,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:18:40,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-02-18 16:18:40,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138110453] [2023-02-18 16:18:40,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:40,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:18:40,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:18:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:18:40,120 INFO L87 Difference]: Start difference. First operand 1363 states and 1483 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:42,817 INFO L93 Difference]: Finished difference Result 1476 states and 1589 transitions. [2023-02-18 16:18:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:18:42,817 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-18 16:18:42,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:42,818 INFO L225 Difference]: With dead ends: 1476 [2023-02-18 16:18:42,818 INFO L226 Difference]: Without dead ends: 1432 [2023-02-18 16:18:42,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=3984, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 16:18:42,819 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1268 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 3370 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:42,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 3370 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:18:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-02-18 16:18:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1363. [2023-02-18 16:18:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.07856093979442) internal successors, (1469), 1362 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1469 transitions. [2023-02-18 16:18:44,262 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1469 transitions. Word has length 50 [2023-02-18 16:18:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:44,262 INFO L495 AbstractCegarLoop]: Abstraction has 1363 states and 1469 transitions. [2023-02-18 16:18:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1469 transitions. [2023-02-18 16:18:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 16:18:44,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:44,263 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:44,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2023-02-18 16:18:44,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:44,465 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1348994537, now seen corresponding path program 123 times [2023-02-18 16:18:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:44,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505633983] [2023-02-18 16:18:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:44,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:18:44,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505633983] [2023-02-18 16:18:44,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505633983] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611895695] [2023-02-18 16:18:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:18:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:44,879 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:44,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2023-02-18 16:18:44,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 16:18:44,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 16:18:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:18:45,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:18:46,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611895695] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:46,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:18:46,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 79 [2023-02-18 16:18:46,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36999167] [2023-02-18 16:18:46,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-02-18 16:18:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-02-18 16:18:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 16:18:46,636 INFO L87 Difference]: Start difference. First operand 1363 states and 1469 transitions. Second operand has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:58,176 INFO L93 Difference]: Finished difference Result 2368 states and 2498 transitions. [2023-02-18 16:18:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-02-18 16:18:58,176 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 16:18:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:58,178 INFO L225 Difference]: With dead ends: 2368 [2023-02-18 16:18:58,178 INFO L226 Difference]: Without dead ends: 2308 [2023-02-18 16:18:58,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 40 SyntacticMatches, 16 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14434 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=11254, Invalid=45628, Unknown=0, NotChecked=0, Total=56882 [2023-02-18 16:18:58,180 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 5490 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5490 SdHoareTripleChecker+Valid, 3253 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:58,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5490 Valid, 3253 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:18:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2023-02-18 16:18:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1473. [2023-02-18 16:18:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 1.078125) internal successors, (1587), 1472 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1587 transitions. [2023-02-18 16:18:59,830 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1587 transitions. Word has length 51 [2023-02-18 16:18:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:59,830 INFO L495 AbstractCegarLoop]: Abstraction has 1473 states and 1587 transitions. [2023-02-18 16:18:59,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:18:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1587 transitions. [2023-02-18 16:18:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 16:18:59,831 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:59,831 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:59,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2023-02-18 16:19:00,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2023-02-18 16:19:00,032 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:00,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:00,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1557026922, now seen corresponding path program 124 times [2023-02-18 16:19:00,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:00,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836635419] [2023-02-18 16:19:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:00,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:19:00,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836635419] [2023-02-18 16:19:00,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836635419] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:19:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127615944] [2023-02-18 16:19:00,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:19:00,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:00,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:00,458 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:00,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2023-02-18 16:19:00,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:19:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:19:00,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 16:19:00,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:19:01,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:19:02,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127615944] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:02,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:19:02,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 79 [2023-02-18 16:19:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79040248] [2023-02-18 16:19:02,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:02,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-02-18 16:19:02,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-02-18 16:19:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 16:19:02,238 INFO L87 Difference]: Start difference. First operand 1473 states and 1587 transitions. Second operand has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:11,936 INFO L93 Difference]: Finished difference Result 2346 states and 2468 transitions. [2023-02-18 16:19:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 16:19:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 16:19:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:11,938 INFO L225 Difference]: With dead ends: 2346 [2023-02-18 16:19:11,938 INFO L226 Difference]: Without dead ends: 2316 [2023-02-18 16:19:11,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 16 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3348 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1138, Invalid=13868, Unknown=0, NotChecked=0, Total=15006 [2023-02-18 16:19:11,939 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 4365 mSDsluCounter, 9826 mSDsCounter, 0 mSdLazyCounter, 3751 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 10070 SdHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 3751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:11,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4365 Valid, 10070 Invalid, 3883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 3751 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 16:19:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2023-02-18 16:19:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1481. [2023-02-18 16:19:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.0777027027027026) internal successors, (1595), 1480 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1595 transitions. [2023-02-18 16:19:13,610 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1595 transitions. Word has length 51 [2023-02-18 16:19:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:13,610 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 1595 transitions. [2023-02-18 16:19:13,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1595 transitions. [2023-02-18 16:19:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 16:19:13,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:13,611 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:13,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2023-02-18 16:19:13,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2023-02-18 16:19:13,812 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:13,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1271243308, now seen corresponding path program 125 times [2023-02-18 16:19:13,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:13,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310174371] [2023-02-18 16:19:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:19:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310174371] [2023-02-18 16:19:13,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310174371] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:19:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024495661] [2023-02-18 16:19:13,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:19:13,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:13,922 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:13,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2023-02-18 16:19:13,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:19:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:19:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:19:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:19:14,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:19:14,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024495661] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:14,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:19:14,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-02-18 16:19:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427264891] [2023-02-18 16:19:14,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:14,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:19:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:19:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:19:14,158 INFO L87 Difference]: Start difference. First operand 1481 states and 1595 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:16,602 INFO L93 Difference]: Finished difference Result 1752 states and 1886 transitions. [2023-02-18 16:19:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 16:19:16,602 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 16:19:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:16,603 INFO L225 Difference]: With dead ends: 1752 [2023-02-18 16:19:16,603 INFO L226 Difference]: Without dead ends: 1536 [2023-02-18 16:19:16,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 23 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1093, Invalid=2099, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:19:16,604 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 244 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:16,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 652 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:19:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2023-02-18 16:19:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1467. [2023-02-18 16:19:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 1.0757162346521145) internal successors, (1577), 1466 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1577 transitions. [2023-02-18 16:19:18,223 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1577 transitions. Word has length 51 [2023-02-18 16:19:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:18,224 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 1577 transitions. [2023-02-18 16:19:18,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1577 transitions. [2023-02-18 16:19:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 16:19:18,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:18,225 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:18,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2023-02-18 16:19:18,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:18,425 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:18,425 INFO L85 PathProgramCache]: Analyzing trace with hash 107254485, now seen corresponding path program 126 times [2023-02-18 16:19:18,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:18,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996883276] [2023-02-18 16:19:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:19:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996883276] [2023-02-18 16:19:18,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996883276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:19:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779003827] [2023-02-18 16:19:18,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:19:18,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:18,540 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:18,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2023-02-18 16:19:18,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 16:19:18,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:19:18,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:19:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:19:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:19:18,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779003827] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:18,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:19:18,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-02-18 16:19:18,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906928950] [2023-02-18 16:19:18,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:18,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:19:18,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:19:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:19:18,783 INFO L87 Difference]: Start difference. First operand 1467 states and 1577 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:21,237 INFO L93 Difference]: Finished difference Result 1543 states and 1646 transitions. [2023-02-18 16:19:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 16:19:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 16:19:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:21,238 INFO L225 Difference]: With dead ends: 1543 [2023-02-18 16:19:21,238 INFO L226 Difference]: Without dead ends: 1537 [2023-02-18 16:19:21,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 23 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1093, Invalid=2099, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:19:21,239 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 148 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:21,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 618 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:19:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2023-02-18 16:19:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1468. [2023-02-18 16:19:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 1.0756646216768917) internal successors, (1578), 1467 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1578 transitions. [2023-02-18 16:19:22,896 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1578 transitions. Word has length 51 [2023-02-18 16:19:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:22,896 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 1578 transitions. [2023-02-18 16:19:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1578 transitions. [2023-02-18 16:19:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:19:22,897 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:22,897 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:22,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2023-02-18 16:19:23,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2023-02-18 16:19:23,102 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash -360556880, now seen corresponding path program 127 times [2023-02-18 16:19:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:23,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331779670] [2023-02-18 16:19:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:19:23,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331779670] [2023-02-18 16:19:23,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331779670] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:19:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488845603] [2023-02-18 16:19:23,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:19:23,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:23,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:23,754 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:23,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2023-02-18 16:19:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:23,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-18 16:19:23,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:19:24,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:19:25,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488845603] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:25,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:19:25,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 65 [2023-02-18 16:19:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105112145] [2023-02-18 16:19:25,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:25,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 16:19:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 16:19:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=4005, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 16:19:25,099 INFO L87 Difference]: Start difference. First operand 1468 states and 1578 transitions. Second operand has 65 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:35,125 INFO L93 Difference]: Finished difference Result 2610 states and 2737 transitions. [2023-02-18 16:19:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 16:19:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:19:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:35,128 INFO L225 Difference]: With dead ends: 2610 [2023-02-18 16:19:35,128 INFO L226 Difference]: Without dead ends: 2601 [2023-02-18 16:19:35,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 31 SyntacticMatches, 50 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=454, Invalid=10676, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 16:19:35,128 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 470 mSDsluCounter, 10316 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 10569 SdHoareTripleChecker+Invalid, 4336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:35,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 10569 Invalid, 4336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 16:19:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2023-02-18 16:19:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 1477. [2023-02-18 16:19:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 1.075880758807588) internal successors, (1588), 1476 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1588 transitions. [2023-02-18 16:19:36,864 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1588 transitions. Word has length 52 [2023-02-18 16:19:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:36,864 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 1588 transitions. [2023-02-18 16:19:36,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1588 transitions. [2023-02-18 16:19:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:19:36,865 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:36,865 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:36,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2023-02-18 16:19:37,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2023-02-18 16:19:37,066 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:37,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -859611408, now seen corresponding path program 128 times [2023-02-18 16:19:37,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:37,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136629051] [2023-02-18 16:19:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:19:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136629051] [2023-02-18 16:19:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136629051] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:19:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5672284] [2023-02-18 16:19:37,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:19:37,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:37,661 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:37,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2023-02-18 16:19:37,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:19:37,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:19:37,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 16:19:37,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:19:38,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:19:38,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5672284] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:38,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:19:38,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 63 [2023-02-18 16:19:38,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221291064] [2023-02-18 16:19:38,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:38,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 16:19:38,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 16:19:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3752, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 16:19:38,917 INFO L87 Difference]: Start difference. First operand 1477 states and 1588 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:48,092 INFO L93 Difference]: Finished difference Result 2301 states and 2411 transitions. [2023-02-18 16:19:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 16:19:48,092 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:19:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:48,094 INFO L225 Difference]: With dead ends: 2301 [2023-02-18 16:19:48,094 INFO L226 Difference]: Without dead ends: 2268 [2023-02-18 16:19:48,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 35 SyntacticMatches, 46 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=421, Invalid=9679, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 16:19:48,095 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 381 mSDsluCounter, 8212 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 8437 SdHoareTripleChecker+Invalid, 3502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:48,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 8437 Invalid, 3502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3501 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:19:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2023-02-18 16:19:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 1468. [2023-02-18 16:19:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 1.0756646216768917) internal successors, (1578), 1467 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1578 transitions. [2023-02-18 16:19:49,739 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1578 transitions. Word has length 52 [2023-02-18 16:19:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:49,739 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 1578 transitions. [2023-02-18 16:19:49,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1578 transitions. [2023-02-18 16:19:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:19:49,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:49,740 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:49,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2023-02-18 16:19:49,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:49,941 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1996745040, now seen corresponding path program 129 times [2023-02-18 16:19:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:49,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339621167] [2023-02-18 16:19:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:49,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:19:50,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339621167] [2023-02-18 16:19:50,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339621167] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:19:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190375019] [2023-02-18 16:19:50,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:19:50,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:50,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:50,493 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:50,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2023-02-18 16:19:50,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 16:19:50,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:19:50,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 16:19:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:19:51,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:19:51,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190375019] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:51,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:19:51,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 61 [2023-02-18 16:19:51,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838141404] [2023-02-18 16:19:51,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:51,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 16:19:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 16:19:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3507, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 16:19:51,684 INFO L87 Difference]: Start difference. First operand 1468 states and 1578 transitions. Second operand has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:19:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:59,501 INFO L93 Difference]: Finished difference Result 2058 states and 2167 transitions. [2023-02-18 16:19:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-18 16:19:59,502 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:19:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:59,504 INFO L225 Difference]: With dead ends: 2058 [2023-02-18 16:19:59,504 INFO L226 Difference]: Without dead ends: 2024 [2023-02-18 16:19:59,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 39 SyntacticMatches, 42 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=415, Invalid=8897, Unknown=0, NotChecked=0, Total=9312 [2023-02-18 16:19:59,504 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 335 mSDsluCounter, 7089 mSDsCounter, 0 mSdLazyCounter, 3297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 7280 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:59,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 7280 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3297 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:19:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2023-02-18 16:20:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1457. [2023-02-18 16:20:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0755494505494505) internal successors, (1566), 1456 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1566 transitions. [2023-02-18 16:20:01,207 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1566 transitions. Word has length 52 [2023-02-18 16:20:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:01,207 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1566 transitions. [2023-02-18 16:20:01,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1566 transitions. [2023-02-18 16:20:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:20:01,208 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:01,208 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:01,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2023-02-18 16:20:01,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:01,409 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash -209019152, now seen corresponding path program 130 times [2023-02-18 16:20:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:01,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482247679] [2023-02-18 16:20:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:01,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:20:01,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482247679] [2023-02-18 16:20:01,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482247679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:20:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260964861] [2023-02-18 16:20:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:20:01,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:01,903 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:01,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2023-02-18 16:20:01,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:20:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:20:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 16:20:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:20:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:20:02,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:20:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:20:03,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260964861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:20:03,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:20:03,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2023-02-18 16:20:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565823984] [2023-02-18 16:20:03,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:20:03,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 16:20:03,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:20:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 16:20:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3270, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:20:03,010 INFO L87 Difference]: Start difference. First operand 1457 states and 1566 transitions. Second operand has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:20:09,510 INFO L93 Difference]: Finished difference Result 1864 states and 1972 transitions. [2023-02-18 16:20:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 16:20:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:20:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:20:09,512 INFO L225 Difference]: With dead ends: 1864 [2023-02-18 16:20:09,512 INFO L226 Difference]: Without dead ends: 1829 [2023-02-18 16:20:09,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 43 SyntacticMatches, 38 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=409, Invalid=8147, Unknown=0, NotChecked=0, Total=8556 [2023-02-18 16:20:09,513 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 287 mSDsluCounter, 5655 mSDsCounter, 0 mSdLazyCounter, 2940 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 5812 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:20:09,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 5812 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2940 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:20:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2023-02-18 16:20:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1444. [2023-02-18 16:20:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 1.0755370755370754) internal successors, (1552), 1443 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1552 transitions. [2023-02-18 16:20:11,156 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1552 transitions. Word has length 52 [2023-02-18 16:20:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:11,156 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 1552 transitions. [2023-02-18 16:20:11,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1552 transitions. [2023-02-18 16:20:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:20:11,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:11,157 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:11,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2023-02-18 16:20:11,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2023-02-18 16:20:11,357 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash -537667920, now seen corresponding path program 131 times [2023-02-18 16:20:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:11,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687726723] [2023-02-18 16:20:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:11,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:20:11,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:11,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687726723] [2023-02-18 16:20:11,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687726723] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:20:11,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869109604] [2023-02-18 16:20:11,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:20:11,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:11,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:11,821 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:11,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2023-02-18 16:20:11,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:20:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:20:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:20:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:20:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:20:12,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:20:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:20:12,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869109604] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:20:12,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:20:12,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 57 [2023-02-18 16:20:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14302290] [2023-02-18 16:20:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:20:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 16:20:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:20:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 16:20:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:20:12,831 INFO L87 Difference]: Start difference. First operand 1444 states and 1552 transitions. Second operand has 57 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:20:18,102 INFO L93 Difference]: Finished difference Result 1711 states and 1818 transitions. [2023-02-18 16:20:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 16:20:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:20:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:20:18,104 INFO L225 Difference]: With dead ends: 1711 [2023-02-18 16:20:18,104 INFO L226 Difference]: Without dead ends: 1675 [2023-02-18 16:20:18,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 47 SyntacticMatches, 34 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=403, Invalid=7429, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 16:20:18,104 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 238 mSDsluCounter, 4258 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 4381 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:20:18,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 4381 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:20:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2023-02-18 16:20:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1429. [2023-02-18 16:20:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.0756302521008403) internal successors, (1536), 1428 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1536 transitions. [2023-02-18 16:20:19,761 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1536 transitions. Word has length 52 [2023-02-18 16:20:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:19,761 INFO L495 AbstractCegarLoop]: Abstraction has 1429 states and 1536 transitions. [2023-02-18 16:20:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1536 transitions. [2023-02-18 16:20:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:20:19,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:19,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:19,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2023-02-18 16:20:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:19,963 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1607720688, now seen corresponding path program 132 times [2023-02-18 16:20:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:19,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591207686] [2023-02-18 16:20:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:19,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:20:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591207686] [2023-02-18 16:20:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591207686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:20:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787003028] [2023-02-18 16:20:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:20:20,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:20,379 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:20,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2023-02-18 16:20:20,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:20:20,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:20:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:20:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:20:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:20:20,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:20:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:20:21,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787003028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:20:21,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:20:21,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 55 [2023-02-18 16:20:21,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934204977] [2023-02-18 16:20:21,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:20:21,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 16:20:21,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:20:21,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 16:20:21,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2820, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 16:20:21,317 INFO L87 Difference]: Start difference. First operand 1429 states and 1536 transitions. Second operand has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:20:25,633 INFO L93 Difference]: Finished difference Result 1591 states and 1697 transitions. [2023-02-18 16:20:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:20:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:20:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:20:25,634 INFO L225 Difference]: With dead ends: 1591 [2023-02-18 16:20:25,634 INFO L226 Difference]: Without dead ends: 1554 [2023-02-18 16:20:25,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 30 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=397, Invalid=6743, Unknown=0, NotChecked=0, Total=7140 [2023-02-18 16:20:25,635 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 198 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3144 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:20:25,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 3144 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:20:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2023-02-18 16:20:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1412. [2023-02-18 16:20:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 1.0758327427356484) internal successors, (1518), 1411 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1518 transitions. [2023-02-18 16:20:27,300 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1518 transitions. Word has length 52 [2023-02-18 16:20:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:27,300 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 1518 transitions. [2023-02-18 16:20:27,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1518 transitions. [2023-02-18 16:20:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:20:27,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:27,313 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:27,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2023-02-18 16:20:27,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:27,518 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -345401680, now seen corresponding path program 133 times [2023-02-18 16:20:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:27,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995253229] [2023-02-18 16:20:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:20:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995253229] [2023-02-18 16:20:27,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995253229] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:20:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763180099] [2023-02-18 16:20:27,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:20:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:27,897 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:27,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2023-02-18 16:20:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:27,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:20:27,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:20:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:20:28,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:20:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:20:28,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763180099] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:20:28,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:20:28,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 53 [2023-02-18 16:20:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207698637] [2023-02-18 16:20:28,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:20:28,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 16:20:28,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:20:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 16:20:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2607, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 16:20:28,764 INFO L87 Difference]: Start difference. First operand 1412 states and 1518 transitions. Second operand has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:20:31,943 INFO L93 Difference]: Finished difference Result 1488 states and 1593 transitions. [2023-02-18 16:20:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 16:20:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:20:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:20:31,944 INFO L225 Difference]: With dead ends: 1488 [2023-02-18 16:20:31,944 INFO L226 Difference]: Without dead ends: 1450 [2023-02-18 16:20:31,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=391, Invalid=6089, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 16:20:31,945 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 145 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:20:31,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1916 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:20:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2023-02-18 16:20:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1393. [2023-02-18 16:20:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.0761494252873562) internal successors, (1498), 1392 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1498 transitions. [2023-02-18 16:20:33,535 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1498 transitions. Word has length 52 [2023-02-18 16:20:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:33,535 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 1498 transitions. [2023-02-18 16:20:33,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1498 transitions. [2023-02-18 16:20:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:20:33,537 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:33,537 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:33,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2023-02-18 16:20:33,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:33,737 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:33,737 INFO L85 PathProgramCache]: Analyzing trace with hash 631185136, now seen corresponding path program 134 times [2023-02-18 16:20:33,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:33,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173833063] [2023-02-18 16:20:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:33,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:20:34,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:34,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173833063] [2023-02-18 16:20:34,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173833063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:20:34,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175925543] [2023-02-18 16:20:34,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:20:34,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:34,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:34,062 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:34,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2023-02-18 16:20:34,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:20:34,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:20:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:20:34,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:20:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:20:34,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:20:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:20:34,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175925543] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:20:34,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:20:34,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 51 [2023-02-18 16:20:34,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876109546] [2023-02-18 16:20:34,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:20:34,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 16:20:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:20:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 16:20:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:20:34,857 INFO L87 Difference]: Start difference. First operand 1393 states and 1498 transitions. Second operand has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:20:37,466 INFO L93 Difference]: Finished difference Result 1448 states and 1555 transitions. [2023-02-18 16:20:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 16:20:37,466 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 16:20:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:20:37,467 INFO L225 Difference]: With dead ends: 1448 [2023-02-18 16:20:37,468 INFO L226 Difference]: Without dead ends: 1442 [2023-02-18 16:20:37,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 59 SyntacticMatches, 22 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=385, Invalid=5467, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 16:20:37,468 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 144 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:20:37,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 732 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:20:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2023-02-18 16:20:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1409. [2023-02-18 16:20:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 1.0767045454545454) internal successors, (1516), 1408 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1516 transitions. [2023-02-18 16:20:39,160 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1516 transitions. Word has length 52 [2023-02-18 16:20:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:39,160 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 1516 transitions. [2023-02-18 16:20:39,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1516 transitions. [2023-02-18 16:20:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 16:20:39,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:39,162 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:39,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2023-02-18 16:20:39,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:39,367 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1924691242, now seen corresponding path program 135 times [2023-02-18 16:20:39,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:39,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219792190] [2023-02-18 16:20:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:39,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:20:39,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219792190] [2023-02-18 16:20:39,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219792190] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:20:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495966575] [2023-02-18 16:20:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:20:39,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:39,834 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2023-02-18 16:20:39,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 16:20:39,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:20:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 16:20:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:20:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:20:40,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:20:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:20:41,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495966575] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:20:41,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:20:41,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 84 [2023-02-18 16:20:41,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539596183] [2023-02-18 16:20:41,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:20:41,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-18 16:20:41,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:20:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-18 16:20:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=6726, Unknown=0, NotChecked=0, Total=6972 [2023-02-18 16:20:41,843 INFO L87 Difference]: Start difference. First operand 1409 states and 1516 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:20:56,501 INFO L93 Difference]: Finished difference Result 2494 states and 2625 transitions. [2023-02-18 16:20:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2023-02-18 16:20:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-18 16:20:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:20:56,503 INFO L225 Difference]: With dead ends: 2494 [2023-02-18 16:20:56,503 INFO L226 Difference]: Without dead ends: 2432 [2023-02-18 16:20:56,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 40 SyntacticMatches, 17 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17819 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=13577, Invalid=55329, Unknown=0, NotChecked=0, Total=68906 [2023-02-18 16:20:56,506 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 6432 mSDsluCounter, 3706 mSDsCounter, 0 mSdLazyCounter, 3222 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6432 SdHoareTripleChecker+Valid, 3850 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:20:56,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6432 Valid, 3850 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3222 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:20:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2023-02-18 16:20:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1520. [2023-02-18 16:20:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 1.0763660302830809) internal successors, (1635), 1519 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1635 transitions. [2023-02-18 16:20:58,331 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1635 transitions. Word has length 53 [2023-02-18 16:20:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:58,332 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 1635 transitions. [2023-02-18 16:20:58,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:20:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1635 transitions. [2023-02-18 16:20:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 16:20:58,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:58,333 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:58,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2023-02-18 16:20:58,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2023-02-18 16:20:58,538 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash 216239415, now seen corresponding path program 136 times [2023-02-18 16:20:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:58,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038672619] [2023-02-18 16:20:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:20:59,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:59,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038672619] [2023-02-18 16:20:59,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038672619] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:20:59,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457417768] [2023-02-18 16:20:59,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:20:59,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:59,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:59,030 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:59,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2023-02-18 16:20:59,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:20:59,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:20:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 16:20:59,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:21:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:21:00,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:21:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:21:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457417768] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:21:01,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:21:01,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 84 [2023-02-18 16:21:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185264930] [2023-02-18 16:21:01,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:21:01,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-18 16:21:01,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:21:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-18 16:21:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=6726, Unknown=0, NotChecked=0, Total=6972 [2023-02-18 16:21:01,155 INFO L87 Difference]: Start difference. First operand 1520 states and 1635 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:21:13,546 INFO L93 Difference]: Finished difference Result 2471 states and 2594 transitions. [2023-02-18 16:21:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-18 16:21:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-18 16:21:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:21:13,548 INFO L225 Difference]: With dead ends: 2471 [2023-02-18 16:21:13,548 INFO L226 Difference]: Without dead ends: 2440 [2023-02-18 16:21:13,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 40 SyntacticMatches, 17 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1262, Invalid=15768, Unknown=0, NotChecked=0, Total=17030 [2023-02-18 16:21:13,550 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 4660 mSDsluCounter, 11897 mSDsCounter, 0 mSdLazyCounter, 4467 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4660 SdHoareTripleChecker+Valid, 12157 SdHoareTripleChecker+Invalid, 4615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:21:13,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4660 Valid, 12157 Invalid, 4615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4467 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 16:21:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2023-02-18 16:21:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1528. [2023-02-18 16:21:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 1.0759659462999345) internal successors, (1643), 1527 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 1643 transitions. [2023-02-18 16:21:15,456 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 1643 transitions. Word has length 53 [2023-02-18 16:21:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:21:15,456 INFO L495 AbstractCegarLoop]: Abstraction has 1528 states and 1643 transitions. [2023-02-18 16:21:15,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 1643 transitions. [2023-02-18 16:21:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 16:21:15,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:21:15,458 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:21:15,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2023-02-18 16:21:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2023-02-18 16:21:15,661 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:21:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:21:15,661 INFO L85 PathProgramCache]: Analyzing trace with hash -306833867, now seen corresponding path program 137 times [2023-02-18 16:21:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:21:15,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455204749] [2023-02-18 16:21:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:21:15,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:21:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:21:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:21:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:21:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455204749] [2023-02-18 16:21:15,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455204749] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:21:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849500683] [2023-02-18 16:21:15,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:21:15,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:15,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:21:15,789 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:21:15,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2023-02-18 16:21:15,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 16:21:15,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:21:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 16:21:15,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:21:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:21:15,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:21:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:21:16,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849500683] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:21:16,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:21:16,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2023-02-18 16:21:16,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740222987] [2023-02-18 16:21:16,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:21:16,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 16:21:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:21:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 16:21:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2023-02-18 16:21:16,050 INFO L87 Difference]: Start difference. First operand 1528 states and 1643 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:21:19,345 INFO L93 Difference]: Finished difference Result 1682 states and 1808 transitions. [2023-02-18 16:21:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 16:21:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-18 16:21:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:21:19,347 INFO L225 Difference]: With dead ends: 1682 [2023-02-18 16:21:19,347 INFO L226 Difference]: Without dead ends: 1663 [2023-02-18 16:21:19,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 70 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1010, Invalid=3280, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 16:21:19,348 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 351 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:21:19,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 515 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:21:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2023-02-18 16:21:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1580. [2023-02-18 16:21:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 1.0842305256491451) internal successors, (1712), 1579 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 1712 transitions. [2023-02-18 16:21:21,409 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 1712 transitions. Word has length 53 [2023-02-18 16:21:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:21:21,409 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 1712 transitions. [2023-02-18 16:21:21,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 1712 transitions. [2023-02-18 16:21:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 16:21:21,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:21:21,410 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:21:21,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2023-02-18 16:21:21,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2023-02-18 16:21:21,611 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:21:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:21:21,611 INFO L85 PathProgramCache]: Analyzing trace with hash -523075244, now seen corresponding path program 138 times [2023-02-18 16:21:21,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:21:21,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935946159] [2023-02-18 16:21:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:21:21,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:21:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:21:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:21:21,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:21:21,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935946159] [2023-02-18 16:21:21,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935946159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:21:21,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153149555] [2023-02-18 16:21:21,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:21:21,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:21:21,737 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:21:21,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2023-02-18 16:21:21,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-18 16:21:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:21:21,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 16:21:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:21:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:21:21,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:21:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-18 16:21:22,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153149555] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:21:22,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:21:22,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2023-02-18 16:21:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43658163] [2023-02-18 16:21:22,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:21:22,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 16:21:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:21:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 16:21:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2023-02-18 16:21:22,031 INFO L87 Difference]: Start difference. First operand 1580 states and 1712 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:21:26,400 INFO L93 Difference]: Finished difference Result 2423 states and 2664 transitions. [2023-02-18 16:21:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 16:21:26,401 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-18 16:21:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:21:26,403 INFO L225 Difference]: With dead ends: 2423 [2023-02-18 16:21:26,403 INFO L226 Difference]: Without dead ends: 2123 [2023-02-18 16:21:26,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 70 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1010, Invalid=3280, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 16:21:26,404 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 896 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:21:26,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 887 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:21:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2023-02-18 16:21:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1758. [2023-02-18 16:21:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 1.085372794536141) internal successors, (1907), 1757 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 1907 transitions. [2023-02-18 16:21:28,879 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 1907 transitions. Word has length 53 [2023-02-18 16:21:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:21:28,879 INFO L495 AbstractCegarLoop]: Abstraction has 1758 states and 1907 transitions. [2023-02-18 16:21:28,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 1907 transitions. [2023-02-18 16:21:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:21:28,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:21:28,881 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:21:28,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2023-02-18 16:21:29,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2023-02-18 16:21:29,081 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:21:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:21:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1223875281, now seen corresponding path program 139 times [2023-02-18 16:21:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:21:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553317567] [2023-02-18 16:21:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:21:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:21:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:21:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:21:29,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:21:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553317567] [2023-02-18 16:21:29,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553317567] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:21:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636072898] [2023-02-18 16:21:29,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:21:29,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:21:29,780 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:21:29,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2023-02-18 16:21:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:21:29,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-18 16:21:29,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:21:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:21:30,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:21:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:21:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636072898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:21:31,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:21:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 68 [2023-02-18 16:21:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556699494] [2023-02-18 16:21:31,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:21:31,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 16:21:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:21:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 16:21:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=4394, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 16:21:31,235 INFO L87 Difference]: Start difference. First operand 1758 states and 1907 transitions. Second operand has 68 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 68 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:21:46,448 INFO L93 Difference]: Finished difference Result 3179 states and 3348 transitions. [2023-02-18 16:21:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-18 16:21:46,448 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 68 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:21:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:21:46,451 INFO L225 Difference]: With dead ends: 3179 [2023-02-18 16:21:46,451 INFO L226 Difference]: Without dead ends: 3170 [2023-02-18 16:21:46,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 32 SyntacticMatches, 52 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=473, Invalid=11737, Unknown=0, NotChecked=0, Total=12210 [2023-02-18 16:21:46,452 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 494 mSDsluCounter, 12306 mSDsCounter, 0 mSdLazyCounter, 5260 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 12576 SdHoareTripleChecker+Invalid, 5261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:21:46,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 12576 Invalid, 5261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5260 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 16:21:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2023-02-18 16:21:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 1767. [2023-02-18 16:21:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 1.0855039637599093) internal successors, (1917), 1766 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 1917 transitions. [2023-02-18 16:21:48,700 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 1917 transitions. Word has length 54 [2023-02-18 16:21:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:21:48,700 INFO L495 AbstractCegarLoop]: Abstraction has 1767 states and 1917 transitions. [2023-02-18 16:21:48,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 68 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:21:48,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 1917 transitions. [2023-02-18 16:21:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:21:48,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:21:48,701 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:21:48,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2023-02-18 16:21:48,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:48,902 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:21:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:21:48,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1746257615, now seen corresponding path program 140 times [2023-02-18 16:21:48,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:21:48,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577267392] [2023-02-18 16:21:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:21:48,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:21:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:21:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:21:49,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:21:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577267392] [2023-02-18 16:21:49,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577267392] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:21:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111602679] [2023-02-18 16:21:49,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:21:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:21:49,588 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:21:49,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2023-02-18 16:21:49,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:21:49,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:21:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-18 16:21:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:21:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:21:50,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:21:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:21:50,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111602679] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:21:50,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:21:50,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 66 [2023-02-18 16:21:50,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397457742] [2023-02-18 16:21:50,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:21:50,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-18 16:21:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:21:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-18 16:21:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 16:21:50,939 INFO L87 Difference]: Start difference. First operand 1767 states and 1917 transitions. Second operand has 66 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:22:04,737 INFO L93 Difference]: Finished difference Result 2829 states and 2978 transitions. [2023-02-18 16:22:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 16:22:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:22:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:22:04,739 INFO L225 Difference]: With dead ends: 2829 [2023-02-18 16:22:04,739 INFO L226 Difference]: Without dead ends: 2795 [2023-02-18 16:22:04,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 35 SyntacticMatches, 49 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=439, Invalid=10691, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 16:22:04,740 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 402 mSDsluCounter, 11079 mSDsCounter, 0 mSdLazyCounter, 5071 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 11317 SdHoareTripleChecker+Invalid, 5072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:22:04,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 11317 Invalid, 5072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5071 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 16:22:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2023-02-18 16:22:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1758. [2023-02-18 16:22:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 1.085372794536141) internal successors, (1907), 1757 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 1907 transitions. [2023-02-18 16:22:06,987 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 1907 transitions. Word has length 54 [2023-02-18 16:22:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:22:06,987 INFO L495 AbstractCegarLoop]: Abstraction has 1758 states and 1907 transitions. [2023-02-18 16:22:06,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 1907 transitions. [2023-02-18 16:22:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:22:06,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:22:06,988 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:22:06,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2023-02-18 16:22:07,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2023-02-18 16:22:07,189 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:22:07,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:22:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2010842961, now seen corresponding path program 141 times [2023-02-18 16:22:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:22:07,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781424251] [2023-02-18 16:22:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:22:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:22:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:22:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:22:07,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:22:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781424251] [2023-02-18 16:22:07,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781424251] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:22:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192782970] [2023-02-18 16:22:07,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:22:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:22:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:22:07,806 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:22:07,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2023-02-18 16:22:07,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 16:22:07,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:22:07,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 16:22:07,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:22:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:22:08,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:22:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:22:09,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192782970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:22:09,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:22:09,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 64 [2023-02-18 16:22:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795490154] [2023-02-18 16:22:09,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:22:09,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 16:22:09,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:22:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 16:22:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3872, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 16:22:09,109 INFO L87 Difference]: Start difference. First operand 1758 states and 1907 transitions. Second operand has 64 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:22:20,927 INFO L93 Difference]: Finished difference Result 2540 states and 2688 transitions. [2023-02-18 16:22:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 16:22:20,928 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:22:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:22:20,930 INFO L225 Difference]: With dead ends: 2540 [2023-02-18 16:22:20,930 INFO L226 Difference]: Without dead ends: 2505 [2023-02-18 16:22:20,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 39 SyntacticMatches, 45 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=433, Invalid=9869, Unknown=0, NotChecked=0, Total=10302 [2023-02-18 16:22:20,930 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 361 mSDsluCounter, 8074 mSDsCounter, 0 mSdLazyCounter, 3798 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 8278 SdHoareTripleChecker+Invalid, 3799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:22:20,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 8278 Invalid, 3799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3798 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 16:22:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2023-02-18 16:22:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 1747. [2023-02-18 16:22:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.0853379152348224) internal successors, (1895), 1746 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 1895 transitions. [2023-02-18 16:22:23,195 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 1895 transitions. Word has length 54 [2023-02-18 16:22:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:22:23,195 INFO L495 AbstractCegarLoop]: Abstraction has 1747 states and 1895 transitions. [2023-02-18 16:22:23,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 1895 transitions. [2023-02-18 16:22:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:22:23,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:22:23,196 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:22:23,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2023-02-18 16:22:23,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:22:23,397 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:22:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:22:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash -481922225, now seen corresponding path program 142 times [2023-02-18 16:22:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:22:23,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985323371] [2023-02-18 16:22:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:22:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:22:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:22:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:22:23,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:22:23,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985323371] [2023-02-18 16:22:23,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985323371] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:22:23,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796121649] [2023-02-18 16:22:23,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:22:23,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:22:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:22:23,965 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:22:23,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2023-02-18 16:22:24,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:22:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:22:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 16:22:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:22:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:22:24,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:22:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:22:25,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796121649] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:22:25,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:22:25,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 62 [2023-02-18 16:22:25,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519060796] [2023-02-18 16:22:25,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:22:25,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 16:22:25,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:22:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 16:22:25,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3623, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 16:22:25,167 INFO L87 Difference]: Start difference. First operand 1747 states and 1895 transitions. Second operand has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:22:35,097 INFO L93 Difference]: Finished difference Result 2306 states and 2453 transitions. [2023-02-18 16:22:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 16:22:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:22:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:22:35,100 INFO L225 Difference]: With dead ends: 2306 [2023-02-18 16:22:35,100 INFO L226 Difference]: Without dead ends: 2270 [2023-02-18 16:22:35,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 43 SyntacticMatches, 41 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=427, Invalid=9079, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 16:22:35,100 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 318 mSDsluCounter, 6700 mSDsCounter, 0 mSdLazyCounter, 3375 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 6870 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:22:35,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 6870 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3375 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 16:22:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2023-02-18 16:22:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1734. [2023-02-18 16:22:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 1.0854010386612811) internal successors, (1881), 1733 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 1881 transitions. [2023-02-18 16:22:37,323 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 1881 transitions. Word has length 54 [2023-02-18 16:22:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:22:37,323 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 1881 transitions. [2023-02-18 16:22:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 1881 transitions. [2023-02-18 16:22:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:22:37,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:22:37,325 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:22:37,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2023-02-18 16:22:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:22:37,525 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:22:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:22:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -541471697, now seen corresponding path program 143 times [2023-02-18 16:22:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:22:37,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296640132] [2023-02-18 16:22:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:22:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:22:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:22:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:22:38,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:22:38,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296640132] [2023-02-18 16:22:38,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296640132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:22:38,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142734841] [2023-02-18 16:22:38,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:22:38,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:22:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:22:38,054 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:22:38,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2023-02-18 16:22:38,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:22:38,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:22:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 16:22:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:22:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:22:38,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:22:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:22:39,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142734841] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:22:39,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:22:39,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 60 [2023-02-18 16:22:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904343937] [2023-02-18 16:22:39,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:22:39,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 16:22:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:22:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 16:22:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3382, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 16:22:39,160 INFO L87 Difference]: Start difference. First operand 1734 states and 1881 transitions. Second operand has 60 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:22:47,216 INFO L93 Difference]: Finished difference Result 2119 states and 2265 transitions. [2023-02-18 16:22:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 16:22:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:22:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:22:47,218 INFO L225 Difference]: With dead ends: 2119 [2023-02-18 16:22:47,218 INFO L226 Difference]: Without dead ends: 2082 [2023-02-18 16:22:47,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 47 SyntacticMatches, 37 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=421, Invalid=8321, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 16:22:47,219 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 272 mSDsluCounter, 4982 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 5118 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:22:47,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 5118 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:22:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2023-02-18 16:22:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1719. [2023-02-18 16:22:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.0855646100116414) internal successors, (1865), 1718 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 1865 transitions. [2023-02-18 16:22:49,411 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 1865 transitions. Word has length 54 [2023-02-18 16:22:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:22:49,411 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 1865 transitions. [2023-02-18 16:22:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 1865 transitions. [2023-02-18 16:22:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:22:49,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:22:49,412 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:22:49,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2023-02-18 16:22:49,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:22:49,613 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:22:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:22:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1008853041, now seen corresponding path program 144 times [2023-02-18 16:22:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:22:49,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850566740] [2023-02-18 16:22:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:22:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:22:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:22:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:22:50,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:22:50,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850566740] [2023-02-18 16:22:50,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850566740] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:22:50,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369863740] [2023-02-18 16:22:50,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:22:50,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:22:50,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:22:50,085 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:22:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2023-02-18 16:22:50,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:22:50,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:22:50,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:22:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:22:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:22:50,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:22:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:22:51,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369863740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:22:51,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:22:51,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 58 [2023-02-18 16:22:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328877767] [2023-02-18 16:22:51,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:22:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 16:22:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:22:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 16:22:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3149, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 16:22:51,156 INFO L87 Difference]: Start difference. First operand 1719 states and 1865 transitions. Second operand has 58 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:22:57,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:22:57,932 INFO L93 Difference]: Finished difference Result 1971 states and 2116 transitions. [2023-02-18 16:22:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 16:22:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:22:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:22:57,933 INFO L225 Difference]: With dead ends: 1971 [2023-02-18 16:22:57,934 INFO L226 Difference]: Without dead ends: 1933 [2023-02-18 16:22:57,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 33 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=7595, Unknown=0, NotChecked=0, Total=8010 [2023-02-18 16:22:57,934 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 226 mSDsluCounter, 3449 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:22:57,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 3551 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:22:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2023-02-18 16:23:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1702. [2023-02-18 16:23:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 1.0858318636096413) internal successors, (1847), 1701 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1847 transitions. [2023-02-18 16:23:00,120 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1847 transitions. Word has length 54 [2023-02-18 16:23:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:23:00,120 INFO L495 AbstractCegarLoop]: Abstraction has 1702 states and 1847 transitions. [2023-02-18 16:23:00,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1847 transitions. [2023-02-18 16:23:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:23:00,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:23:00,127 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:23:00,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2023-02-18 16:23:00,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:00,327 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:23:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:23:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -905732177, now seen corresponding path program 145 times [2023-02-18 16:23:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:23:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890517147] [2023-02-18 16:23:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:23:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:23:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:23:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:23:00,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:23:00,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890517147] [2023-02-18 16:23:00,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890517147] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:23:00,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530925885] [2023-02-18 16:23:00,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:23:00,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:00,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:23:00,744 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:23:00,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2023-02-18 16:23:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:23:00,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:23:00,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:23:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:23:01,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:23:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:23:01,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530925885] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:23:01,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:23:01,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 56 [2023-02-18 16:23:01,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567622705] [2023-02-18 16:23:01,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:23:01,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 16:23:01,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:23:01,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 16:23:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2924, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 16:23:01,733 INFO L87 Difference]: Start difference. First operand 1702 states and 1847 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:23:07,153 INFO L93 Difference]: Finished difference Result 1854 states and 1998 transitions. [2023-02-18 16:23:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 16:23:07,153 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:23:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:23:07,155 INFO L225 Difference]: With dead ends: 1854 [2023-02-18 16:23:07,155 INFO L226 Difference]: Without dead ends: 1815 [2023-02-18 16:23:07,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 55 SyntacticMatches, 29 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=409, Invalid=6901, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 16:23:07,155 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 177 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:23:07,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2147 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:23:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2023-02-18 16:23:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1683. [2023-02-18 16:23:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 1.0862068965517242) internal successors, (1827), 1682 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 1827 transitions. [2023-02-18 16:23:09,327 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 1827 transitions. Word has length 54 [2023-02-18 16:23:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:23:09,327 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 1827 transitions. [2023-02-18 16:23:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 1827 transitions. [2023-02-18 16:23:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:23:09,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:23:09,329 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:23:09,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2023-02-18 16:23:09,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:09,529 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:23:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:23:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1025671394, now seen corresponding path program 146 times [2023-02-18 16:23:09,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:23:09,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263407809] [2023-02-18 16:23:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:23:09,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:23:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:23:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-18 16:23:09,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:23:09,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263407809] [2023-02-18 16:23:09,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263407809] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:23:09,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871962872] [2023-02-18 16:23:09,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:23:09,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:09,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:23:09,724 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:23:09,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2023-02-18 16:23:09,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:23:09,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:23:09,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 16:23:09,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:23:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-18 16:23:10,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:23:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-18 16:23:10,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871962872] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:23:10,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:23:10,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-02-18 16:23:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552610934] [2023-02-18 16:23:10,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:23:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:23:10,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:23:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:23:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:23:10,440 INFO L87 Difference]: Start difference. First operand 1683 states and 1827 transitions. Second operand has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:23:15,237 INFO L93 Difference]: Finished difference Result 2054 states and 2223 transitions. [2023-02-18 16:23:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 16:23:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:23:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:23:15,239 INFO L225 Difference]: With dead ends: 2054 [2023-02-18 16:23:15,239 INFO L226 Difference]: Without dead ends: 1964 [2023-02-18 16:23:15,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2734, Invalid=10606, Unknown=0, NotChecked=0, Total=13340 [2023-02-18 16:23:15,240 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 2466 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:23:15,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2466 Valid, 1997 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:23:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2023-02-18 16:23:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1838. [2023-02-18 16:23:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.0783886771910725) internal successors, (1981), 1837 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 1981 transitions. [2023-02-18 16:23:17,714 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 1981 transitions. Word has length 54 [2023-02-18 16:23:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:23:17,714 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 1981 transitions. [2023-02-18 16:23:17,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 1981 transitions. [2023-02-18 16:23:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:23:17,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:23:17,715 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:23:17,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2023-02-18 16:23:17,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2023-02-18 16:23:17,916 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:23:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:23:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash -979055537, now seen corresponding path program 147 times [2023-02-18 16:23:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:23:17,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407860519] [2023-02-18 16:23:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:23:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:23:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:23:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:23:18,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:23:18,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407860519] [2023-02-18 16:23:18,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407860519] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:23:18,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542804869] [2023-02-18 16:23:18,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:23:18,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:18,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:23:18,297 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:23:18,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2023-02-18 16:23:18,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:23:18,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:23:18,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:23:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:23:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:23:18,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:23:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:23:19,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542804869] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:23:19,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:23:19,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 54 [2023-02-18 16:23:19,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667872375] [2023-02-18 16:23:19,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:23:19,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 16:23:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:23:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 16:23:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:23:19,208 INFO L87 Difference]: Start difference. First operand 1838 states and 1981 transitions. Second operand has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:23:24,073 INFO L93 Difference]: Finished difference Result 1952 states and 2098 transitions. [2023-02-18 16:23:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 16:23:24,074 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:23:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:23:24,075 INFO L225 Difference]: With dead ends: 1952 [2023-02-18 16:23:24,075 INFO L226 Difference]: Without dead ends: 1912 [2023-02-18 16:23:24,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 59 SyntacticMatches, 25 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=403, Invalid=6239, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 16:23:24,076 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 148 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:23:24,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1328 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:23:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2023-02-18 16:23:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1831. [2023-02-18 16:23:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 1.0792349726775956) internal successors, (1975), 1830 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 1975 transitions. [2023-02-18 16:23:26,533 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 1975 transitions. Word has length 54 [2023-02-18 16:23:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:23:26,533 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 1975 transitions. [2023-02-18 16:23:26,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 1975 transitions. [2023-02-18 16:23:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:23:26,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:23:26,535 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:23:26,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2023-02-18 16:23:26,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2023-02-18 16:23:26,735 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:23:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:23:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash -202467874, now seen corresponding path program 148 times [2023-02-18 16:23:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:23:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280501544] [2023-02-18 16:23:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:23:26,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:23:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:23:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-18 16:23:26,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:23:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280501544] [2023-02-18 16:23:26,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280501544] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:23:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696143611] [2023-02-18 16:23:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:23:26,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:23:26,942 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:23:26,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2023-02-18 16:23:26,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:23:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:23:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 16:23:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:23:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-18 16:23:27,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:23:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-18 16:23:27,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696143611] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:23:27,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:23:27,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-02-18 16:23:27,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381060894] [2023-02-18 16:23:27,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:23:27,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:23:27,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:23:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:23:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:23:27,647 INFO L87 Difference]: Start difference. First operand 1831 states and 1975 transitions. Second operand has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:23:32,025 INFO L93 Difference]: Finished difference Result 1963 states and 2099 transitions. [2023-02-18 16:23:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:23:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-02-18 16:23:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:23:32,027 INFO L225 Difference]: With dead ends: 1963 [2023-02-18 16:23:32,027 INFO L226 Difference]: Without dead ends: 1914 [2023-02-18 16:23:32,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=520, Invalid=5030, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 16:23:32,028 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 1664 mSDsluCounter, 3789 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 3947 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:23:32,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 3947 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:23:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2023-02-18 16:23:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1831. [2023-02-18 16:23:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 1.0704918032786885) internal successors, (1959), 1830 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 1959 transitions. [2023-02-18 16:23:34,461 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 1959 transitions. Word has length 54 [2023-02-18 16:23:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:23:34,461 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 1959 transitions. [2023-02-18 16:23:34,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 1959 transitions. [2023-02-18 16:23:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 16:23:34,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:23:34,463 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:23:34,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2023-02-18 16:23:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2023-02-18 16:23:34,663 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:23:34,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:23:34,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1377209399, now seen corresponding path program 149 times [2023-02-18 16:23:34,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:23:34,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687315247] [2023-02-18 16:23:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:23:34,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:23:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:23:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:23:35,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:23:35,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687315247] [2023-02-18 16:23:35,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687315247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:23:35,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791411826] [2023-02-18 16:23:35,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:23:35,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:35,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:23:35,179 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:23:35,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2023-02-18 16:23:35,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-18 16:23:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:23:35,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 16:23:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:23:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:23:36,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:23:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:23:37,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791411826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:23:37,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:23:37,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-02-18 16:23:37,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937377874] [2023-02-18 16:23:37,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:23:37,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-18 16:23:37,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:23:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-18 16:23:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 16:23:37,462 INFO L87 Difference]: Start difference. First operand 1831 states and 1959 transitions. Second operand has 89 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:23:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:23:57,782 INFO L93 Difference]: Finished difference Result 3190 states and 3345 transitions. [2023-02-18 16:23:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-02-18 16:23:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 16:23:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:23:57,785 INFO L225 Difference]: With dead ends: 3190 [2023-02-18 16:23:57,785 INFO L226 Difference]: Without dead ends: 3124 [2023-02-18 16:23:57,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 40 SyntacticMatches, 18 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21753 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=16224, Invalid=66432, Unknown=0, NotChecked=0, Total=82656 [2023-02-18 16:23:57,788 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 5743 mSDsluCounter, 4442 mSDsCounter, 0 mSdLazyCounter, 3858 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5743 SdHoareTripleChecker+Valid, 4595 SdHoareTripleChecker+Invalid, 4007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:23:57,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5743 Valid, 4595 Invalid, 4007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3858 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 16:23:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2023-02-18 16:24:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 1966. [2023-02-18 16:24:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 1.0702290076335879) internal successors, (2103), 1965 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2103 transitions. [2023-02-18 16:24:00,572 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2103 transitions. Word has length 55 [2023-02-18 16:24:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:24:00,572 INFO L495 AbstractCegarLoop]: Abstraction has 1966 states and 2103 transitions. [2023-02-18 16:24:00,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2103 transitions. [2023-02-18 16:24:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 16:24:00,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:24:00,574 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:24:00,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2023-02-18 16:24:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2023-02-18 16:24:00,774 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:24:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:24:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -973416970, now seen corresponding path program 150 times [2023-02-18 16:24:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:24:00,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681629612] [2023-02-18 16:24:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:24:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:24:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:24:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:24:01,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:24:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681629612] [2023-02-18 16:24:01,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681629612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:24:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532732492] [2023-02-18 16:24:01,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:24:01,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:24:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:24:01,299 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:24:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2023-02-18 16:24:01,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-18 16:24:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:24:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 16:24:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:24:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:24:02,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:24:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:24:03,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532732492] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:24:03,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:24:03,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-02-18 16:24:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156654676] [2023-02-18 16:24:03,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:24:03,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-18 16:24:03,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:24:03,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-18 16:24:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 16:24:03,637 INFO L87 Difference]: Start difference. First operand 1966 states and 2103 transitions. Second operand has 89 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:24:21,018 INFO L93 Difference]: Finished difference Result 3166 states and 3312 transitions. [2023-02-18 16:24:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 16:24:21,018 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 16:24:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:24:21,021 INFO L225 Difference]: With dead ends: 3166 [2023-02-18 16:24:21,021 INFO L226 Difference]: Without dead ends: 3133 [2023-02-18 16:24:21,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 40 SyntacticMatches, 18 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4338 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1392, Invalid=17790, Unknown=0, NotChecked=0, Total=19182 [2023-02-18 16:24:21,022 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 5164 mSDsluCounter, 11966 mSDsCounter, 0 mSdLazyCounter, 4449 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5164 SdHoareTripleChecker+Valid, 12242 SdHoareTripleChecker+Invalid, 4615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 4449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:24:21,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5164 Valid, 12242 Invalid, 4615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 4449 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 16:24:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2023-02-18 16:24:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 1975. [2023-02-18 16:24:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.0699088145896656) internal successors, (2112), 1974 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2112 transitions. [2023-02-18 16:24:23,846 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2112 transitions. Word has length 55 [2023-02-18 16:24:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:24:23,846 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 2112 transitions. [2023-02-18 16:24:23,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2112 transitions. [2023-02-18 16:24:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 16:24:23,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:24:23,847 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:24:23,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2023-02-18 16:24:24,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2023-02-18 16:24:24,048 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:24:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:24:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1920402024, now seen corresponding path program 151 times [2023-02-18 16:24:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:24:24,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326757212] [2023-02-18 16:24:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:24:24,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:24:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:24:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 16:24:24,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:24:24,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326757212] [2023-02-18 16:24:24,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326757212] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:24:24,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737497781] [2023-02-18 16:24:24,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:24:24,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:24:24,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:24:24,182 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:24:24,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2023-02-18 16:24:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:24:24,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 16:24:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:24:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 16:24:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:24:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 16:24:24,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737497781] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:24:24,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:24:24,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-02-18 16:24:24,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340818044] [2023-02-18 16:24:24,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:24:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 16:24:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:24:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 16:24:24,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2023-02-18 16:24:24,470 INFO L87 Difference]: Start difference. First operand 1975 states and 2112 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:24:28,554 INFO L93 Difference]: Finished difference Result 2304 states and 2464 transitions. [2023-02-18 16:24:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 16:24:28,554 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 16:24:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:24:28,556 INFO L225 Difference]: With dead ends: 2304 [2023-02-18 16:24:28,556 INFO L226 Difference]: Without dead ends: 2044 [2023-02-18 16:24:28,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 73 SyntacticMatches, 26 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1554, Invalid=3002, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 16:24:28,556 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 315 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:24:28,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 710 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:24:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2023-02-18 16:24:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1961. [2023-02-18 16:24:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.0683673469387756) internal successors, (2094), 1960 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2094 transitions. [2023-02-18 16:24:31,319 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2094 transitions. Word has length 55 [2023-02-18 16:24:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:24:31,319 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2094 transitions. [2023-02-18 16:24:31,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2094 transitions. [2023-02-18 16:24:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 16:24:31,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:24:31,320 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:24:31,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2023-02-18 16:24:31,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:24:31,525 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:24:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:24:31,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1200385675, now seen corresponding path program 152 times [2023-02-18 16:24:31,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:24:31,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966675469] [2023-02-18 16:24:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:24:31,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:24:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:24:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 16:24:31,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:24:31,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966675469] [2023-02-18 16:24:31,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966675469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:24:31,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858901657] [2023-02-18 16:24:31,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:24:31,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:24:31,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:24:31,662 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:24:31,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2023-02-18 16:24:31,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:24:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:24:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 16:24:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:24:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 16:24:31,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:24:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 16:24:31,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858901657] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:24:31,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:24:31,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-02-18 16:24:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712912769] [2023-02-18 16:24:31,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:24:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 16:24:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:24:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 16:24:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2023-02-18 16:24:31,936 INFO L87 Difference]: Start difference. First operand 1961 states and 2094 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:24:35,940 INFO L93 Difference]: Finished difference Result 2051 states and 2176 transitions. [2023-02-18 16:24:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 16:24:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 16:24:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:24:35,942 INFO L225 Difference]: With dead ends: 2051 [2023-02-18 16:24:35,942 INFO L226 Difference]: Without dead ends: 2045 [2023-02-18 16:24:35,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 73 SyntacticMatches, 26 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1554, Invalid=3002, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 16:24:35,943 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 191 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:24:35,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 346 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:24:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2023-02-18 16:24:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1962. [2023-02-18 16:24:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.068332483426823) internal successors, (2095), 1961 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2095 transitions. [2023-02-18 16:24:38,662 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2095 transitions. Word has length 55 [2023-02-18 16:24:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:24:38,662 INFO L495 AbstractCegarLoop]: Abstraction has 1962 states and 2095 transitions. [2023-02-18 16:24:38,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2095 transitions. [2023-02-18 16:24:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:24:38,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:24:38,663 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:24:38,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2023-02-18 16:24:38,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:24:38,864 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:24:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:24:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 551482448, now seen corresponding path program 153 times [2023-02-18 16:24:38,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:24:38,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088877108] [2023-02-18 16:24:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:24:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:24:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:24:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:24:39,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:24:39,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088877108] [2023-02-18 16:24:39,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088877108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:24:39,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468584537] [2023-02-18 16:24:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:24:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:24:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:24:39,612 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:24:39,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2023-02-18 16:24:39,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-18 16:24:39,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:24:39,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-18 16:24:39,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:24:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:24:40,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:24:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:24:41,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468584537] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:24:41,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:24:41,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 71 [2023-02-18 16:24:41,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953586951] [2023-02-18 16:24:41,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:24:41,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-18 16:24:41,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:24:41,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-18 16:24:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=4801, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 16:24:41,194 INFO L87 Difference]: Start difference. First operand 1962 states and 2095 transitions. Second operand has 71 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:24:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:24:58,325 INFO L93 Difference]: Finished difference Result 3490 states and 3642 transitions. [2023-02-18 16:24:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-18 16:24:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 16:24:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:24:58,328 INFO L225 Difference]: With dead ends: 3490 [2023-02-18 16:24:58,328 INFO L226 Difference]: Without dead ends: 3481 [2023-02-18 16:24:58,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 32 SyntacticMatches, 55 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=492, Invalid=12848, Unknown=0, NotChecked=0, Total=13340 [2023-02-18 16:24:58,329 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 520 mSDsluCounter, 13329 mSDsCounter, 0 mSdLazyCounter, 5657 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 13616 SdHoareTripleChecker+Invalid, 5658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:24:58,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 13616 Invalid, 5658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5657 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 16:24:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2023-02-18 16:25:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 1971. [2023-02-18 16:25:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 1.0685279187817258) internal successors, (2105), 1970 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2105 transitions. [2023-02-18 16:25:01,064 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2105 transitions. Word has length 56 [2023-02-18 16:25:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:01,064 INFO L495 AbstractCegarLoop]: Abstraction has 1971 states and 2105 transitions. [2023-02-18 16:25:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2105 transitions. [2023-02-18 16:25:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:25:01,066 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:01,066 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:01,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2023-02-18 16:25:01,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:01,266 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1364357104, now seen corresponding path program 154 times [2023-02-18 16:25:01,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:01,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182811656] [2023-02-18 16:25:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:25:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182811656] [2023-02-18 16:25:01,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182811656] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:25:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585023698] [2023-02-18 16:25:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:25:01,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:01,977 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:01,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2023-02-18 16:25:02,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:25:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:25:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-18 16:25:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:25:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:25:03,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585023698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:25:03,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:25:03,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 69 [2023-02-18 16:25:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145529315] [2023-02-18 16:25:03,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 16:25:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 16:25:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=4524, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 16:25:03,456 INFO L87 Difference]: Start difference. First operand 1971 states and 2105 transitions. Second operand has 69 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:19,170 INFO L93 Difference]: Finished difference Result 3117 states and 3250 transitions. [2023-02-18 16:25:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-18 16:25:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 16:25:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:19,173 INFO L225 Difference]: With dead ends: 3117 [2023-02-18 16:25:19,173 INFO L226 Difference]: Without dead ends: 3082 [2023-02-18 16:25:19,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 35 SyntacticMatches, 52 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=457, Invalid=11753, Unknown=0, NotChecked=0, Total=12210 [2023-02-18 16:25:19,173 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 428 mSDsluCounter, 10955 mSDsCounter, 0 mSdLazyCounter, 4688 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 11214 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:19,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 11214 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4688 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 16:25:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2023-02-18 16:25:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 1962. [2023-02-18 16:25:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.068332483426823) internal successors, (2095), 1961 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2095 transitions. [2023-02-18 16:25:21,883 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2095 transitions. Word has length 56 [2023-02-18 16:25:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:21,883 INFO L495 AbstractCegarLoop]: Abstraction has 1962 states and 2095 transitions. [2023-02-18 16:25:21,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2095 transitions. [2023-02-18 16:25:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:25:21,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:21,885 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:21,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2023-02-18 16:25:22,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:22,085 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:22,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1435487152, now seen corresponding path program 155 times [2023-02-18 16:25:22,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:22,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103594329] [2023-02-18 16:25:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:22,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:25:22,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103594329] [2023-02-18 16:25:22,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103594329] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:25:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560736429] [2023-02-18 16:25:22,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:25:22,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:22,803 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:22,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2023-02-18 16:25:22,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 16:25:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:25:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-18 16:25:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:25:23,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:25:24,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560736429] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:25:24,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:25:24,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 67 [2023-02-18 16:25:24,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852126195] [2023-02-18 16:25:24,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:24,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-18 16:25:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-18 16:25:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4255, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 16:25:24,215 INFO L87 Difference]: Start difference. First operand 1962 states and 2095 transitions. Second operand has 67 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:37,680 INFO L93 Difference]: Finished difference Result 2811 states and 2943 transitions. [2023-02-18 16:25:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 16:25:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 16:25:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:37,682 INFO L225 Difference]: With dead ends: 2811 [2023-02-18 16:25:37,682 INFO L226 Difference]: Without dead ends: 2775 [2023-02-18 16:25:37,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 39 SyntacticMatches, 48 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=451, Invalid=10891, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 16:25:37,683 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 385 mSDsluCounter, 9583 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 9808 SdHoareTripleChecker+Invalid, 4503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:37,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 9808 Invalid, 4503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4502 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 16:25:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-02-18 16:25:40,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1951. [2023-02-18 16:25:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.0682051282051281) internal successors, (2083), 1950 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2083 transitions. [2023-02-18 16:25:40,366 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2083 transitions. Word has length 56 [2023-02-18 16:25:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:40,366 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 2083 transitions. [2023-02-18 16:25:40,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2083 transitions. [2023-02-18 16:25:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:25:40,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:40,368 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:40,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2023-02-18 16:25:40,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2023-02-18 16:25:40,568 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:40,569 INFO L85 PathProgramCache]: Analyzing trace with hash 74141712, now seen corresponding path program 156 times [2023-02-18 16:25:40,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:40,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134077981] [2023-02-18 16:25:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:40,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:25:41,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:41,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134077981] [2023-02-18 16:25:41,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134077981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:25:41,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000221339] [2023-02-18 16:25:41,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:25:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:41,165 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:41,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2023-02-18 16:25:41,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 16:25:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:25:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 16:25:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:25:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:25:42,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000221339] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:25:42,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:25:42,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 65 [2023-02-18 16:25:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818856023] [2023-02-18 16:25:42,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 16:25:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 16:25:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3994, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 16:25:42,494 INFO L87 Difference]: Start difference. First operand 1951 states and 2083 transitions. Second operand has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:53,869 INFO L93 Difference]: Finished difference Result 2562 states and 2693 transitions. [2023-02-18 16:25:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-18 16:25:53,869 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 16:25:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:53,871 INFO L225 Difference]: With dead ends: 2562 [2023-02-18 16:25:53,871 INFO L226 Difference]: Without dead ends: 2525 [2023-02-18 16:25:53,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 42 SyntacticMatches, 45 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=445, Invalid=10061, Unknown=0, NotChecked=0, Total=10506 [2023-02-18 16:25:53,872 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 337 mSDsluCounter, 7590 mSDsCounter, 0 mSdLazyCounter, 3753 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 7781 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:53,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 7781 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3753 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:25:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2023-02-18 16:25:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1938. [2023-02-18 16:25:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 1.068146618482189) internal successors, (2069), 1937 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2069 transitions. [2023-02-18 16:25:56,544 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2069 transitions. Word has length 56 [2023-02-18 16:25:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:56,544 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2069 transitions. [2023-02-18 16:25:56,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2069 transitions. [2023-02-18 16:25:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:25:56,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:56,546 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:56,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2023-02-18 16:25:56,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:56,746 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:56,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1637649328, now seen corresponding path program 157 times [2023-02-18 16:25:56,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:56,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989255211] [2023-02-18 16:25:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:25:57,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989255211] [2023-02-18 16:25:57,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989255211] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:25:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312496563] [2023-02-18 16:25:57,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:25:57,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:57,299 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:57,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2023-02-18 16:25:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 16:25:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:25:58,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:25:58,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312496563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:25:58,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:25:58,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 63 [2023-02-18 16:25:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584881218] [2023-02-18 16:25:58,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:58,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 16:25:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 16:25:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3741, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 16:25:58,516 INFO L87 Difference]: Start difference. First operand 1938 states and 2069 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:26:07,919 INFO L93 Difference]: Finished difference Result 2362 states and 2492 transitions. [2023-02-18 16:26:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 16:26:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 16:26:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:26:07,921 INFO L225 Difference]: With dead ends: 2362 [2023-02-18 16:26:07,921 INFO L226 Difference]: Without dead ends: 2324 [2023-02-18 16:26:07,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 47 SyntacticMatches, 40 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=439, Invalid=9263, Unknown=0, NotChecked=0, Total=9702 [2023-02-18 16:26:07,922 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 292 mSDsluCounter, 5616 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 5773 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:26:07,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 5773 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:26:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2023-02-18 16:26:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1923. [2023-02-18 16:26:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 1.0681581685744017) internal successors, (2053), 1922 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2053 transitions. [2023-02-18 16:26:10,592 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2053 transitions. Word has length 56 [2023-02-18 16:26:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:26:10,592 INFO L495 AbstractCegarLoop]: Abstraction has 1923 states and 2053 transitions. [2023-02-18 16:26:10,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2053 transitions. [2023-02-18 16:26:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:26:10,594 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:26:10,594 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:26:10,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2023-02-18 16:26:10,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:10,794 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:26:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:26:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1506218000, now seen corresponding path program 158 times [2023-02-18 16:26:10,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:26:10,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743628964] [2023-02-18 16:26:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:26:10,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:26:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:26:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:26:11,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:26:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743628964] [2023-02-18 16:26:11,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743628964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:26:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644595952] [2023-02-18 16:26:11,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:26:11,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:26:11,299 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:26:11,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2023-02-18 16:26:11,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:26:11,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:26:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 16:26:11,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:26:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:26:12,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:26:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:26:12,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644595952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:26:12,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:26:12,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 61 [2023-02-18 16:26:12,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594635681] [2023-02-18 16:26:12,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:26:12,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 16:26:12,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:26:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 16:26:12,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3496, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 16:26:12,445 INFO L87 Difference]: Start difference. First operand 1923 states and 2053 transitions. Second operand has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:26:20,139 INFO L93 Difference]: Finished difference Result 2203 states and 2332 transitions. [2023-02-18 16:26:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 16:26:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 16:26:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:26:20,141 INFO L225 Difference]: With dead ends: 2203 [2023-02-18 16:26:20,141 INFO L226 Difference]: Without dead ends: 2164 [2023-02-18 16:26:20,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 51 SyntacticMatches, 36 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=433, Invalid=8497, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 16:26:20,142 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 244 mSDsluCounter, 4423 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 4546 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:26:20,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 4546 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:26:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2023-02-18 16:26:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1906. [2023-02-18 16:26:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 1.068241469816273) internal successors, (2035), 1905 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2035 transitions. [2023-02-18 16:26:22,845 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2035 transitions. Word has length 56 [2023-02-18 16:26:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:26:22,845 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 2035 transitions. [2023-02-18 16:26:22,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2035 transitions. [2023-02-18 16:26:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:26:22,846 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:26:22,846 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:26:22,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2023-02-18 16:26:23,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2023-02-18 16:26:23,047 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:26:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:26:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1330072496, now seen corresponding path program 159 times [2023-02-18 16:26:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:26:23,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990942171] [2023-02-18 16:26:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:26:23,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:26:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:26:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:26:23,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:26:23,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990942171] [2023-02-18 16:26:23,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990942171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:26:23,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976161055] [2023-02-18 16:26:23,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:26:23,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:23,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:26:23,498 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:26:23,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2023-02-18 16:26:23,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:26:23,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:26:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:26:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:26:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:26:24,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:26:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:26:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976161055] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:26:24,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:26:24,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 59 [2023-02-18 16:26:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229430766] [2023-02-18 16:26:24,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:26:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 16:26:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:26:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 16:26:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:26:24,565 INFO L87 Difference]: Start difference. First operand 1906 states and 2035 transitions. Second operand has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:26:30,734 INFO L93 Difference]: Finished difference Result 2077 states and 2205 transitions. [2023-02-18 16:26:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 16:26:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 16:26:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:26:30,736 INFO L225 Difference]: With dead ends: 2077 [2023-02-18 16:26:30,736 INFO L226 Difference]: Without dead ends: 2037 [2023-02-18 16:26:30,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 55 SyntacticMatches, 32 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=427, Invalid=7763, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 16:26:30,736 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 204 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:26:30,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 2670 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:26:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2023-02-18 16:26:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1887. [2023-02-18 16:26:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 1.0683987274655355) internal successors, (2015), 1886 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2015 transitions. [2023-02-18 16:26:33,357 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2015 transitions. Word has length 56 [2023-02-18 16:26:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:26:33,357 INFO L495 AbstractCegarLoop]: Abstraction has 1887 states and 2015 transitions. [2023-02-18 16:26:33,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:26:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2015 transitions. [2023-02-18 16:26:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:26:33,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:26:33,359 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:26:33,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2023-02-18 16:26:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2023-02-18 16:26:33,559 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:26:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:26:33,559 INFO L85 PathProgramCache]: Analyzing trace with hash -356462576, now seen corresponding path program 160 times [2023-02-18 16:26:33,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:26:33,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198546747] [2023-02-18 16:26:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:26:33,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:26:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:26:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:26:33,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:26:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198546747] [2023-02-18 16:26:33,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198546747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:26:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378144363] [2023-02-18 16:26:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:26:33,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:26:33,966 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:26:33,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2023-02-18 16:26:34,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:26:34,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:26:34,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:26:34,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:26:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:26:34,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:26:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 16:26:34,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378144363] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:26:34,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:26:34,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 57 [2023-02-18 16:26:34,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173898320] [2023-02-18 16:26:34,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:26:34,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 16:26:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:26:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 16:26:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3030, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:26:34,957 INFO L87 Difference]: Start difference. First operand 1887 states and 2015 transitions. Second operand has 57 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)