./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/bitvector/soft_float_4-3a.c.cil.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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 00:21:50,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 00:21:50,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 00:21:50,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 00:21:50,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 00:21:50,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 00:21:50,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 00:21:50,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 00:21:50,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 00:21:50,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 00:21:50,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 00:21:50,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 00:21:50,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 00:21:50,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 00:21:50,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 00:21:50,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 00:21:50,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 00:21:50,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 00:21:50,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 00:21:50,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 00:21:50,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 00:21:50,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 00:21:50,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 00:21:50,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 00:21:50,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 00:21:50,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 00:21:50,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 00:21:50,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 00:21:50,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 00:21:50,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 00:21:50,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 00:21:50,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 00:21:50,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 00:21:50,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 00:21:50,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 00:21:50,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 00:21:50,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 00:21:50,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 00:21:50,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 00:21:50,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 00:21:50,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 00:21:50,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 00:21:50,725 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 00:21:50,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 00:21:50,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 00:21:50,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 00:21:50,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 00:21:50,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 00:21:50,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 00:21:50,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 00:21:50,727 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 00:21:50,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 00:21:50,728 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 00:21:50,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 00:21:50,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 00:21:50,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 00:21:50,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 00:21:50,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 00:21:50,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 00:21:50,729 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 00:21:50,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 00:21:50,729 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 00:21:50,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 00:21:50,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 00:21:50,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 00:21:50,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 00:21:50,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:21:50,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 00:21:50,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 00:21:50,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 00:21:50,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 00:21:50,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 00:21:50,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 00:21:50,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 00:21:50,731 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 00:21:50,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 00:21:50,732 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 00:21:50,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2023-02-17 00:21:50,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 00:21:50,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 00:21:50,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 00:21:50,913 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 00:21:50,913 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 00:21:50,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-17 00:21:51,921 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 00:21:52,069 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 00:21:52,070 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-17 00:21:52,080 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db8c5637/40e333c9b247499caaca656244aa603a/FLAGa547f7f23 [2023-02-17 00:21:52,089 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db8c5637/40e333c9b247499caaca656244aa603a [2023-02-17 00:21:52,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 00:21:52,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 00:21:52,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 00:21:52,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 00:21:52,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 00:21:52,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed00f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52, skipping insertion in model container [2023-02-17 00:21:52,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 00:21:52,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 00:21:52,220 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/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-02-17 00:21:52,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:21:52,276 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 00:21:52,284 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/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-02-17 00:21:52,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:21:52,310 INFO L208 MainTranslator]: Completed translation [2023-02-17 00:21:52,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52 WrapperNode [2023-02-17 00:21:52,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 00:21:52,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 00:21:52,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 00:21:52,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 00:21:52,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,350 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-02-17 00:21:52,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 00:21:52,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 00:21:52,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 00:21:52,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 00:21:52,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,370 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 00:21:52,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 00:21:52,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 00:21:52,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 00:21:52,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (1/1) ... [2023-02-17 00:21:52,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:21:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:21:52,402 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) [2023-02-17 00:21:52,409 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 [2023-02-17 00:21:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 00:21:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 00:21:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-17 00:21:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-17 00:21:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 00:21:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 00:21:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-02-17 00:21:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-02-17 00:21:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 00:21:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 00:21:52,494 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 00:21:52,501 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 00:21:52,825 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 00:21:52,830 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 00:21:52,831 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 00:21:52,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:21:52 BoogieIcfgContainer [2023-02-17 00:21:52,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 00:21:52,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 00:21:52,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 00:21:52,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 00:21:52,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 12:21:52" (1/3) ... [2023-02-17 00:21:52,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cf9a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:21:52, skipping insertion in model container [2023-02-17 00:21:52,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:21:52" (2/3) ... [2023-02-17 00:21:52,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cf9a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:21:52, skipping insertion in model container [2023-02-17 00:21:52,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:21:52" (3/3) ... [2023-02-17 00:21:52,837 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2023-02-17 00:21:52,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 00:21:52,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 00:21:52,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 00:21:52,921 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;@5aa31a7d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 00:21:52,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 00:21:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 00:21:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:21:52,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:52,932 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:52,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1494196714, now seen corresponding path program 1 times [2023-02-17 00:21:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:52,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516428982] [2023-02-17 00:21:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:52,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:53,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:53,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:21:53,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:53,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516428982] [2023-02-17 00:21:53,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516428982] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:21:53,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721610456] [2023-02-17 00:21:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:53,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:21:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:21:53,454 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) [2023-02-17 00:21:53,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 00:21:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 00:21:53,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:21:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:21:53,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:21:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 00:21:53,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721610456] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 00:21:53,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 00:21:53,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 5] total 13 [2023-02-17 00:21:53,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898332226] [2023-02-17 00:21:53,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:53,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:21:53,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:53,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:21:53,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:21:53,704 INFO L87 Difference]: Start difference. First operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:53,753 INFO L93 Difference]: Finished difference Result 152 states and 239 transitions. [2023-02-17 00:21:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:21:53,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-02-17 00:21:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:53,761 INFO L225 Difference]: With dead ends: 152 [2023-02-17 00:21:53,761 INFO L226 Difference]: Without dead ends: 75 [2023-02-17 00:21:53,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:21:53,779 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:53,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 173 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:21:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-17 00:21:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-17 00:21:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 60 states have internal predecessors, (86), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 00:21:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 103 transitions. [2023-02-17 00:21:53,809 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 103 transitions. Word has length 39 [2023-02-17 00:21:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:53,810 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 103 transitions. [2023-02-17 00:21:53,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 103 transitions. [2023-02-17 00:21:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 00:21:53,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:53,812 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:53,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 00:21:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 00:21:54,019 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 237309308, now seen corresponding path program 1 times [2023-02-17 00:21:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:54,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932021634] [2023-02-17 00:21:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:54,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:21:54,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:54,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932021634] [2023-02-17 00:21:54,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932021634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:21:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735847670] [2023-02-17 00:21:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:54,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:21:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:21:54,221 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) [2023-02-17 00:21:54,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 00:21:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 00:21:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:21:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:21:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:21:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:21:54,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735847670] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:21:54,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:21:54,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-17 00:21:54,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522998956] [2023-02-17 00:21:54,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:21:54,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 00:21:54,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 00:21:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-17 00:21:54,473 INFO L87 Difference]: Start difference. First operand 72 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 00:21:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:54,648 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2023-02-17 00:21:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:21:54,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-02-17 00:21:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:54,655 INFO L225 Difference]: With dead ends: 193 [2023-02-17 00:21:54,655 INFO L226 Difference]: Without dead ends: 148 [2023-02-17 00:21:54,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-02-17 00:21:54,659 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 178 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:54,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1213 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:21:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-17 00:21:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-17 00:21:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 93 states have internal predecessors, (130), 14 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-02-17 00:21:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2023-02-17 00:21:54,683 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 40 [2023-02-17 00:21:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:54,684 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2023-02-17 00:21:54,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 00:21:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2023-02-17 00:21:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 00:21:54,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:54,689 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:54,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 00:21:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-17 00:21:54,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1042554370, now seen corresponding path program 1 times [2023-02-17 00:21:54,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:54,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49913858] [2023-02-17 00:21:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:54,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:21:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49913858] [2023-02-17 00:21:54,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49913858] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:21:54,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:21:54,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 00:21:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799609365] [2023-02-17 00:21:54,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:54,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 00:21:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 00:21:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:21:54,993 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:55,051 INFO L93 Difference]: Finished difference Result 208 states and 297 transitions. [2023-02-17 00:21:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:21:55,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-17 00:21:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:55,053 INFO L225 Difference]: With dead ends: 208 [2023-02-17 00:21:55,054 INFO L226 Difference]: Without dead ends: 134 [2023-02-17 00:21:55,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:21:55,056 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 17 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:55,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 666 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:21:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-17 00:21:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2023-02-17 00:21:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 97 states have (on average 1.402061855670103) internal successors, (136), 99 states have internal predecessors, (136), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-02-17 00:21:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2023-02-17 00:21:55,079 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 40 [2023-02-17 00:21:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:55,080 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2023-02-17 00:21:55,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2023-02-17 00:21:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 00:21:55,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:55,084 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:55,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 00:21:55,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1148734548, now seen corresponding path program 1 times [2023-02-17 00:21:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:55,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214227933] [2023-02-17 00:21:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:21:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 00:21:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:21:55,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:55,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214227933] [2023-02-17 00:21:55,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214227933] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:21:55,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:21:55,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 00:21:55,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395745194] [2023-02-17 00:21:55,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:55,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 00:21:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:55,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 00:21:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:21:55,315 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 00:21:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:55,473 INFO L93 Difference]: Finished difference Result 179 states and 256 transitions. [2023-02-17 00:21:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:21:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2023-02-17 00:21:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:55,475 INFO L225 Difference]: With dead ends: 179 [2023-02-17 00:21:55,475 INFO L226 Difference]: Without dead ends: 168 [2023-02-17 00:21:55,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:21:55,476 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 92 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:55,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1046 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:21:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-17 00:21:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2023-02-17 00:21:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 125 states have (on average 1.416) internal successors, (177), 128 states have internal predecessors, (177), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (25), 19 states have call predecessors, (25), 19 states have call successors, (25) [2023-02-17 00:21:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 222 transitions. [2023-02-17 00:21:55,485 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 222 transitions. Word has length 44 [2023-02-17 00:21:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:55,486 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 222 transitions. [2023-02-17 00:21:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 00:21:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 222 transitions. [2023-02-17 00:21:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 00:21:55,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:55,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 00:21:55,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash -447669970, now seen corresponding path program 1 times [2023-02-17 00:21:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476244299] [2023-02-17 00:21:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:21:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 00:21:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 00:21:55,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476244299] [2023-02-17 00:21:55,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476244299] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:21:55,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:21:55,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 00:21:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613373588] [2023-02-17 00:21:55,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:55,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 00:21:55,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 00:21:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:21:55,706 INFO L87 Difference]: Start difference. First operand 153 states and 222 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:21:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:55,931 INFO L93 Difference]: Finished difference Result 187 states and 266 transitions. [2023-02-17 00:21:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 00:21:55,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-17 00:21:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:55,933 INFO L225 Difference]: With dead ends: 187 [2023-02-17 00:21:55,933 INFO L226 Difference]: Without dead ends: 179 [2023-02-17 00:21:55,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-02-17 00:21:55,934 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 75 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:55,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1685 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 00:21:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-17 00:21:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2023-02-17 00:21:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.4015151515151516) internal successors, (185), 134 states have internal predecessors, (185), 20 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (28), 21 states have call predecessors, (28), 19 states have call successors, (28) [2023-02-17 00:21:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2023-02-17 00:21:55,943 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2023-02-17 00:21:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:55,943 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2023-02-17 00:21:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:21:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2023-02-17 00:21:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 00:21:55,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:55,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:55,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 00:21:55,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:55,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1178693971, now seen corresponding path program 1 times [2023-02-17 00:21:55,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:55,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282145472] [2023-02-17 00:21:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:21:55,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:55,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282145472] [2023-02-17 00:21:55,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282145472] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:21:55,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:21:55,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 00:21:55,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625486755] [2023-02-17 00:21:55,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:55,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 00:21:55,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 00:21:55,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:21:55,999 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:56,074 INFO L93 Difference]: Finished difference Result 374 states and 549 transitions. [2023-02-17 00:21:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:21:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-17 00:21:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:56,076 INFO L225 Difference]: With dead ends: 374 [2023-02-17 00:21:56,076 INFO L226 Difference]: Without dead ends: 275 [2023-02-17 00:21:56,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:21:56,077 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 115 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:56,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1056 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:21:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-17 00:21:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 241. [2023-02-17 00:21:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 201 states have (on average 1.407960199004975) internal successors, (283), 204 states have internal predecessors, (283), 28 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (40), 29 states have call predecessors, (40), 27 states have call successors, (40) [2023-02-17 00:21:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 351 transitions. [2023-02-17 00:21:56,087 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 351 transitions. Word has length 44 [2023-02-17 00:21:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:56,087 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 351 transitions. [2023-02-17 00:21:56,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 351 transitions. [2023-02-17 00:21:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 00:21:56,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:56,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:56,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 00:21:56,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1988040597, now seen corresponding path program 1 times [2023-02-17 00:21:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:56,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29671952] [2023-02-17 00:21:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:21:56,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:56,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29671952] [2023-02-17 00:21:56,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29671952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:21:56,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87644726] [2023-02-17 00:21:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:56,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:21:56,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:21:56,207 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) [2023-02-17 00:21:56,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 00:21:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 00:21:56,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:21:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:21:56,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:21:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 00:21:56,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87644726] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 00:21:56,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 00:21:56,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 15 [2023-02-17 00:21:56,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290018224] [2023-02-17 00:21:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:56,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:21:56,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:56,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:21:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:21:56,330 INFO L87 Difference]: Start difference. First operand 241 states and 351 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:56,349 INFO L93 Difference]: Finished difference Result 375 states and 544 transitions. [2023-02-17 00:21:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:21:56,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-17 00:21:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:56,351 INFO L225 Difference]: With dead ends: 375 [2023-02-17 00:21:56,351 INFO L226 Difference]: Without dead ends: 203 [2023-02-17 00:21:56,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:21:56,352 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 74 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:56,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:21:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-17 00:21:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2023-02-17 00:21:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 152 states have internal predecessors, (205), 21 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (33), 22 states have call predecessors, (33), 20 states have call successors, (33) [2023-02-17 00:21:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 259 transitions. [2023-02-17 00:21:56,360 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 259 transitions. Word has length 44 [2023-02-17 00:21:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:56,360 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 259 transitions. [2023-02-17 00:21:56,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:21:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 259 transitions. [2023-02-17 00:21:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 00:21:56,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:56,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:56,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 00:21:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:21:56,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1299374066, now seen corresponding path program 1 times [2023-02-17 00:21:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:56,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346575331] [2023-02-17 00:21:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:56,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:21:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 00:21:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 00:21:56,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:56,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346575331] [2023-02-17 00:21:56,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346575331] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:21:56,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:21:56,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:21:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958598858] [2023-02-17 00:21:56,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:21:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:21:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:21:56,635 INFO L87 Difference]: Start difference. First operand 181 states and 259 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 00:21:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:56,658 INFO L93 Difference]: Finished difference Result 189 states and 266 transitions. [2023-02-17 00:21:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:21:56,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2023-02-17 00:21:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:56,661 INFO L225 Difference]: With dead ends: 189 [2023-02-17 00:21:56,661 INFO L226 Difference]: Without dead ends: 178 [2023-02-17 00:21:56,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:21:56,663 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:56,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 482 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:21:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-17 00:21:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2023-02-17 00:21:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 144 states have (on average 1.375) internal successors, (198), 147 states have internal predecessors, (198), 21 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (30), 21 states have call predecessors, (30), 20 states have call successors, (30) [2023-02-17 00:21:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 249 transitions. [2023-02-17 00:21:56,673 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 249 transitions. Word has length 46 [2023-02-17 00:21:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:56,674 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 249 transitions. [2023-02-17 00:21:56,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 00:21:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 249 transitions. [2023-02-17 00:21:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 00:21:56,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:56,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:56,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 00:21:56,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash -662590119, now seen corresponding path program 1 times [2023-02-17 00:21:56,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:56,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465314883] [2023-02-17 00:21:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:56,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 00:21:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 00:21:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:21:56,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:56,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465314883] [2023-02-17 00:21:56,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465314883] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:21:56,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:21:56,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 00:21:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549868478] [2023-02-17 00:21:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:21:56,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 00:21:56,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 00:21:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:21:56,786 INFO L87 Difference]: Start difference. First operand 175 states and 249 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:21:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:56,926 INFO L93 Difference]: Finished difference Result 229 states and 323 transitions. [2023-02-17 00:21:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:21:56,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2023-02-17 00:21:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:56,928 INFO L225 Difference]: With dead ends: 229 [2023-02-17 00:21:56,928 INFO L226 Difference]: Without dead ends: 218 [2023-02-17 00:21:56,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:21:56,929 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 86 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:56,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 975 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:21:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-17 00:21:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2023-02-17 00:21:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 148 states have (on average 1.364864864864865) internal successors, (202), 152 states have internal predecessors, (202), 23 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2023-02-17 00:21:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2023-02-17 00:21:56,939 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 48 [2023-02-17 00:21:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:56,940 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2023-02-17 00:21:56,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:21:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2023-02-17 00:21:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 00:21:56,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:56,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:56,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 00:21:56,941 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 38474459, now seen corresponding path program 1 times [2023-02-17 00:21:56,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:56,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096778171] [2023-02-17 00:21:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:56,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:57,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:57,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:57,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:21:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:57,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 00:21:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:57,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 00:21:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:21:57,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:57,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096778171] [2023-02-17 00:21:57,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096778171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:21:57,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173364952] [2023-02-17 00:21:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:57,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:21:57,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:21:57,133 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) [2023-02-17 00:21:57,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 00:21:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 00:21:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:21:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:21:57,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:21:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:21:57,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173364952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:21:57,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:21:57,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-17 00:21:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414025895] [2023-02-17 00:21:57,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:21:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 00:21:57,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 00:21:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-17 00:21:57,609 INFO L87 Difference]: Start difference. First operand 182 states and 260 transitions. Second operand has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 00:21:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:21:58,964 INFO L93 Difference]: Finished difference Result 352 states and 515 transitions. [2023-02-17 00:21:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 00:21:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2023-02-17 00:21:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:21:58,966 INFO L225 Difference]: With dead ends: 352 [2023-02-17 00:21:58,966 INFO L226 Difference]: Without dead ends: 340 [2023-02-17 00:21:58,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-02-17 00:21:58,968 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 350 mSDsluCounter, 4022 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 4219 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 00:21:58,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 4219 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 00:21:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-17 00:21:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2023-02-17 00:21:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 176 states have (on average 1.3238636363636365) internal successors, (233), 184 states have internal predecessors, (233), 28 states have call successors, (28), 7 states have call predecessors, (28), 16 states have return successors, (66), 29 states have call predecessors, (66), 27 states have call successors, (66) [2023-02-17 00:21:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2023-02-17 00:21:58,995 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 48 [2023-02-17 00:21:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:21:58,996 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2023-02-17 00:21:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 00:21:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2023-02-17 00:21:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 00:21:58,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:21:58,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:21:59,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 00:21:59,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:21:59,203 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:21:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:21:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1608873757, now seen corresponding path program 2 times [2023-02-17 00:21:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:21:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614075131] [2023-02-17 00:21:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:21:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:21:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:59,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:21:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:59,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:21:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:59,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 00:21:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:59,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 00:21:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:59,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 00:21:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:21:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:21:59,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:21:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614075131] [2023-02-17 00:21:59,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614075131] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:21:59,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015612107] [2023-02-17 00:21:59,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:21:59,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:21:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:21:59,362 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) [2023-02-17 00:21:59,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 00:21:59,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:21:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:21:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 00:21:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:21:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:21:59,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:21:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:21:59,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015612107] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:21:59,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:21:59,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-17 00:21:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576954018] [2023-02-17 00:21:59,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:21:59,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 00:21:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:21:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 00:21:59,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-17 00:21:59,750 INFO L87 Difference]: Start difference. First operand 221 states and 327 transitions. Second operand has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-17 00:22:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:01,259 INFO L93 Difference]: Finished difference Result 393 states and 624 transitions. [2023-02-17 00:22:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 00:22:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2023-02-17 00:22:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:01,261 INFO L225 Difference]: With dead ends: 393 [2023-02-17 00:22:01,261 INFO L226 Difference]: Without dead ends: 380 [2023-02-17 00:22:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-02-17 00:22:01,262 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 350 mSDsluCounter, 4052 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:01,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 4245 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 00:22:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-17 00:22:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 241. [2023-02-17 00:22:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 187 states have (on average 1.304812834224599) internal successors, (244), 197 states have internal predecessors, (244), 35 states have call successors, (35), 7 states have call predecessors, (35), 18 states have return successors, (105), 36 states have call predecessors, (105), 34 states have call successors, (105) [2023-02-17 00:22:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 384 transitions. [2023-02-17 00:22:01,280 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 384 transitions. Word has length 48 [2023-02-17 00:22:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:01,280 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 384 transitions. [2023-02-17 00:22:01,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-17 00:22:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 384 transitions. [2023-02-17 00:22:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:22:01,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:01,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:01,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 00:22:01,487 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,SelfDestructingSolverStorable10 [2023-02-17 00:22:01,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1889190333, now seen corresponding path program 1 times [2023-02-17 00:22:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915370009] [2023-02-17 00:22:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:01,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:01,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:22:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:01,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:22:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:22:01,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:01,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915370009] [2023-02-17 00:22:01,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915370009] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:01,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868611558] [2023-02-17 00:22:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:01,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:01,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:01,565 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) [2023-02-17 00:22:01,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 00:22:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 00:22:01,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:22:01,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:22:01,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868611558] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:22:01,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:22:01,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-02-17 00:22:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635036095] [2023-02-17 00:22:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:22:01,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 00:22:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 00:22:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-02-17 00:22:01,708 INFO L87 Difference]: Start difference. First operand 241 states and 384 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 00:22:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:01,817 INFO L93 Difference]: Finished difference Result 404 states and 615 transitions. [2023-02-17 00:22:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:22:01,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-02-17 00:22:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:01,819 INFO L225 Difference]: With dead ends: 404 [2023-02-17 00:22:01,819 INFO L226 Difference]: Without dead ends: 329 [2023-02-17 00:22:01,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-02-17 00:22:01,820 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 152 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:01,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 973 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:22:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-17 00:22:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 298. [2023-02-17 00:22:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 235 states have (on average 1.3148936170212766) internal successors, (309), 246 states have internal predecessors, (309), 42 states have call successors, (42), 8 states have call predecessors, (42), 20 states have return successors, (96), 43 states have call predecessors, (96), 41 states have call successors, (96) [2023-02-17 00:22:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 447 transitions. [2023-02-17 00:22:01,855 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 447 transitions. Word has length 49 [2023-02-17 00:22:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:01,855 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 447 transitions. [2023-02-17 00:22:01,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 00:22:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 447 transitions. [2023-02-17 00:22:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:22:01,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:01,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:01,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 00:22:02,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:02,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1079843707, now seen corresponding path program 1 times [2023-02-17 00:22:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:02,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132335607] [2023-02-17 00:22:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:22:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:22:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:22:02,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:02,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132335607] [2023-02-17 00:22:02,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132335607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:02,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084840558] [2023-02-17 00:22:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:02,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:02,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:02,144 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) [2023-02-17 00:22:02,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 00:22:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 00:22:02,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:22:02,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:22:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:22:02,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084840558] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:22:02,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:22:02,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-17 00:22:02,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842253870] [2023-02-17 00:22:02,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:22:02,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 00:22:02,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:02,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 00:22:02,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-17 00:22:02,343 INFO L87 Difference]: Start difference. First operand 298 states and 447 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 00:22:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:02,432 INFO L93 Difference]: Finished difference Result 461 states and 667 transitions. [2023-02-17 00:22:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:22:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 49 [2023-02-17 00:22:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:02,434 INFO L225 Difference]: With dead ends: 461 [2023-02-17 00:22:02,434 INFO L226 Difference]: Without dead ends: 309 [2023-02-17 00:22:02,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-02-17 00:22:02,435 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 27 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:02,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1158 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:22:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-02-17 00:22:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 288. [2023-02-17 00:22:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 227 states have (on average 1.2995594713656389) internal successors, (295), 238 states have internal predecessors, (295), 40 states have call successors, (40), 9 states have call predecessors, (40), 20 states have return successors, (90), 40 states have call predecessors, (90), 39 states have call successors, (90) [2023-02-17 00:22:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 425 transitions. [2023-02-17 00:22:02,449 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 425 transitions. Word has length 49 [2023-02-17 00:22:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:02,450 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 425 transitions. [2023-02-17 00:22:02,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 00:22:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 425 transitions. [2023-02-17 00:22:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 00:22:02,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:02,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:02,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 00:22:02,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:02,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash 698178595, now seen corresponding path program 1 times [2023-02-17 00:22:02,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:02,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891676474] [2023-02-17 00:22:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:22:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 00:22:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 00:22:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:22:02,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:02,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891676474] [2023-02-17 00:22:02,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891676474] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:02,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393326707] [2023-02-17 00:22:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:02,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:02,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:02,745 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) [2023-02-17 00:22:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 00:22:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:02,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 00:22:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 00:22:02,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:22:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:22:02,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393326707] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:22:02,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:22:02,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2023-02-17 00:22:02,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028875406] [2023-02-17 00:22:02,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:22:02,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 00:22:02,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:02,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 00:22:02,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-02-17 00:22:02,936 INFO L87 Difference]: Start difference. First operand 288 states and 425 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 00:22:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:03,366 INFO L93 Difference]: Finished difference Result 698 states and 1051 transitions. [2023-02-17 00:22:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 00:22:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2023-02-17 00:22:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:03,368 INFO L225 Difference]: With dead ends: 698 [2023-02-17 00:22:03,368 INFO L226 Difference]: Without dead ends: 402 [2023-02-17 00:22:03,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 00:22:03,369 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 139 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:03,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 2383 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 00:22:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-02-17 00:22:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 287. [2023-02-17 00:22:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 227 states have (on average 1.2951541850220265) internal successors, (294), 237 states have internal predecessors, (294), 39 states have call successors, (39), 10 states have call predecessors, (39), 20 states have return successors, (88), 39 states have call predecessors, (88), 38 states have call successors, (88) [2023-02-17 00:22:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 421 transitions. [2023-02-17 00:22:03,384 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 421 transitions. Word has length 50 [2023-02-17 00:22:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:03,384 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 421 transitions. [2023-02-17 00:22:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 00:22:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 421 transitions. [2023-02-17 00:22:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 00:22:03,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:03,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:03,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 00:22:03,590 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,SelfDestructingSolverStorable13 [2023-02-17 00:22:03,590 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1308875237, now seen corresponding path program 2 times [2023-02-17 00:22:03,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:03,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253109662] [2023-02-17 00:22:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:03,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:03,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 00:22:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:03,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 00:22:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:03,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 00:22:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:22:03,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:03,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253109662] [2023-02-17 00:22:03,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253109662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:03,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190558524] [2023-02-17 00:22:03,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:22:03,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:03,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:03,651 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) [2023-02-17 00:22:03,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 00:22:03,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:22:03,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:22:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 00:22:03,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:22:03,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:22:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:22:03,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190558524] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:22:03,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:22:03,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-02-17 00:22:03,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930488055] [2023-02-17 00:22:03,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:22:03,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 00:22:03,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:03,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 00:22:03,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-17 00:22:03,845 INFO L87 Difference]: Start difference. First operand 287 states and 421 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 00:22:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:04,302 INFO L93 Difference]: Finished difference Result 572 states and 889 transitions. [2023-02-17 00:22:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 00:22:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 50 [2023-02-17 00:22:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:04,305 INFO L225 Difference]: With dead ends: 572 [2023-02-17 00:22:04,305 INFO L226 Difference]: Without dead ends: 553 [2023-02-17 00:22:04,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 00:22:04,307 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 243 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:04,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 2078 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 00:22:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-02-17 00:22:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 298. [2023-02-17 00:22:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.2832618025751072) internal successors, (299), 244 states have internal predecessors, (299), 43 states have call successors, (43), 10 states have call predecessors, (43), 21 states have return successors, (112), 43 states have call predecessors, (112), 42 states have call successors, (112) [2023-02-17 00:22:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 454 transitions. [2023-02-17 00:22:04,331 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 454 transitions. Word has length 50 [2023-02-17 00:22:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:04,332 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 454 transitions. [2023-02-17 00:22:04,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 00:22:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 454 transitions. [2023-02-17 00:22:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:22:04,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:04,335 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:04,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 00:22:04,540 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,SelfDestructingSolverStorable14 [2023-02-17 00:22:04,540 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2061582742, now seen corresponding path program 1 times [2023-02-17 00:22:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055329394] [2023-02-17 00:22:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:04,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 00:22:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 00:22:04,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:04,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055329394] [2023-02-17 00:22:04,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055329394] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:22:04,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:22:04,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 00:22:04,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680141435] [2023-02-17 00:22:04,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:22:04,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 00:22:04,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 00:22:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:22:04,599 INFO L87 Difference]: Start difference. First operand 298 states and 454 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:22:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:04,699 INFO L93 Difference]: Finished difference Result 438 states and 659 transitions. [2023-02-17 00:22:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:22:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2023-02-17 00:22:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:04,701 INFO L225 Difference]: With dead ends: 438 [2023-02-17 00:22:04,701 INFO L226 Difference]: Without dead ends: 320 [2023-02-17 00:22:04,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:22:04,702 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 158 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:04,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1310 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:22:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-17 00:22:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2023-02-17 00:22:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.2789699570815452) internal successors, (298), 244 states have internal predecessors, (298), 43 states have call successors, (43), 10 states have call predecessors, (43), 21 states have return successors, (112), 43 states have call predecessors, (112), 42 states have call successors, (112) [2023-02-17 00:22:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 453 transitions. [2023-02-17 00:22:04,730 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 453 transitions. Word has length 49 [2023-02-17 00:22:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:04,730 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 453 transitions. [2023-02-17 00:22:04,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:22:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 453 transitions. [2023-02-17 00:22:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:22:04,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:04,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:04,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 00:22:04,732 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1646578540, now seen corresponding path program 1 times [2023-02-17 00:22:04,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:04,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831452451] [2023-02-17 00:22:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 00:22:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 00:22:04,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:04,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831452451] [2023-02-17 00:22:04,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831452451] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093477165] [2023-02-17 00:22:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:04,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:04,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:04,817 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) [2023-02-17 00:22:04,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 00:22:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 00:22:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 00:22:04,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:22:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 00:22:04,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093477165] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:22:04,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:22:04,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-17 00:22:04,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965434657] [2023-02-17 00:22:04,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:22:04,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 00:22:04,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 00:22:04,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-02-17 00:22:04,940 INFO L87 Difference]: Start difference. First operand 298 states and 453 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 00:22:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:05,062 INFO L93 Difference]: Finished difference Result 609 states and 887 transitions. [2023-02-17 00:22:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:22:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2023-02-17 00:22:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:05,065 INFO L225 Difference]: With dead ends: 609 [2023-02-17 00:22:05,065 INFO L226 Difference]: Without dead ends: 469 [2023-02-17 00:22:05,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-17 00:22:05,067 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 223 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:05,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1575 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:22:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-17 00:22:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 419. [2023-02-17 00:22:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 336 states have (on average 1.2886904761904763) internal successors, (433), 352 states have internal predecessors, (433), 53 states have call successors, (53), 13 states have call predecessors, (53), 29 states have return successors, (119), 53 states have call predecessors, (119), 52 states have call successors, (119) [2023-02-17 00:22:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 605 transitions. [2023-02-17 00:22:05,094 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 605 transitions. Word has length 49 [2023-02-17 00:22:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:05,095 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 605 transitions. [2023-02-17 00:22:05,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 00:22:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 605 transitions. [2023-02-17 00:22:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 00:22:05,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:05,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:05,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-17 00:22:05,302 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,SelfDestructingSolverStorable16 [2023-02-17 00:22:05,302 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:05,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash 837231914, now seen corresponding path program 1 times [2023-02-17 00:22:05,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:05,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888814369] [2023-02-17 00:22:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:05,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 00:22:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 00:22:05,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888814369] [2023-02-17 00:22:05,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888814369] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:22:05,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:22:05,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 00:22:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658418885] [2023-02-17 00:22:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:22:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 00:22:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 00:22:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:22:05,517 INFO L87 Difference]: Start difference. First operand 419 states and 605 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 00:22:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:05,760 INFO L93 Difference]: Finished difference Result 578 states and 831 transitions. [2023-02-17 00:22:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 00:22:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-17 00:22:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:05,762 INFO L225 Difference]: With dead ends: 578 [2023-02-17 00:22:05,762 INFO L226 Difference]: Without dead ends: 456 [2023-02-17 00:22:05,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-02-17 00:22:05,763 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 135 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:05,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1677 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 00:22:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-02-17 00:22:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 431. [2023-02-17 00:22:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 347 states have (on average 1.282420749279539) internal successors, (445), 361 states have internal predecessors, (445), 54 states have call successors, (54), 15 states have call predecessors, (54), 29 states have return successors, (113), 54 states have call predecessors, (113), 53 states have call successors, (113) [2023-02-17 00:22:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 612 transitions. [2023-02-17 00:22:05,790 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 612 transitions. Word has length 49 [2023-02-17 00:22:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:05,790 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 612 transitions. [2023-02-17 00:22:05,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 00:22:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 612 transitions. [2023-02-17 00:22:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 00:22:05,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:05,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:05,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 00:22:05,793 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 584790902, now seen corresponding path program 1 times [2023-02-17 00:22:05,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:05,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372562370] [2023-02-17 00:22:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:05,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:22:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 00:22:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 00:22:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:22:05,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372562370] [2023-02-17 00:22:05,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372562370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:05,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640416401] [2023-02-17 00:22:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:05,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:06,005 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) [2023-02-17 00:22:06,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 00:22:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 00:22:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:22:06,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:22:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:22:06,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640416401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:22:06,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:22:06,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-17 00:22:06,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192997984] [2023-02-17 00:22:06,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:22:06,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 00:22:06,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:06,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 00:22:06,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-17 00:22:06,377 INFO L87 Difference]: Start difference. First operand 431 states and 612 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 00:22:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:07,123 INFO L93 Difference]: Finished difference Result 535 states and 785 transitions. [2023-02-17 00:22:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 00:22:07,123 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-17 00:22:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:07,125 INFO L225 Difference]: With dead ends: 535 [2023-02-17 00:22:07,125 INFO L226 Difference]: Without dead ends: 503 [2023-02-17 00:22:07,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 00:22:07,126 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 276 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:07,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1763 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 00:22:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-17 00:22:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 422. [2023-02-17 00:22:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 354 states have internal predecessors, (438), 53 states have call successors, (53), 13 states have call predecessors, (53), 28 states have return successors, (110), 54 states have call predecessors, (110), 52 states have call successors, (110) [2023-02-17 00:22:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 601 transitions. [2023-02-17 00:22:07,160 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 601 transitions. Word has length 53 [2023-02-17 00:22:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:07,161 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 601 transitions. [2023-02-17 00:22:07,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 00:22:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 601 transitions. [2023-02-17 00:22:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 00:22:07,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:07,163 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:07,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 00:22:07,368 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 [2023-02-17 00:22:07,368 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1202108924, now seen corresponding path program 2 times [2023-02-17 00:22:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:07,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264091088] [2023-02-17 00:22:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:07,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:07,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:07,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:22:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:07,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 00:22:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:07,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 00:22:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:22:07,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264091088] [2023-02-17 00:22:07,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264091088] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155672272] [2023-02-17 00:22:07,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:22:07,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:07,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:07,529 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) [2023-02-17 00:22:07,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 00:22:07,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:22:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:22:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 00:22:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:22:07,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:22:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 00:22:07,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155672272] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:22:07,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:22:07,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-17 00:22:07,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649569931] [2023-02-17 00:22:07,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:22:07,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 00:22:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 00:22:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-17 00:22:07,860 INFO L87 Difference]: Start difference. First operand 422 states and 601 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 00:22:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:08,665 INFO L93 Difference]: Finished difference Result 523 states and 761 transitions. [2023-02-17 00:22:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 00:22:08,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-17 00:22:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:08,667 INFO L225 Difference]: With dead ends: 523 [2023-02-17 00:22:08,667 INFO L226 Difference]: Without dead ends: 503 [2023-02-17 00:22:08,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 00:22:08,668 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 295 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:08,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1662 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 00:22:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-17 00:22:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 368. [2023-02-17 00:22:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 298 states have (on average 1.2852348993288591) internal successors, (383), 310 states have internal predecessors, (383), 43 states have call successors, (43), 13 states have call predecessors, (43), 26 states have return successors, (83), 44 states have call predecessors, (83), 42 states have call successors, (83) [2023-02-17 00:22:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 509 transitions. [2023-02-17 00:22:08,697 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 509 transitions. Word has length 53 [2023-02-17 00:22:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:08,698 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 509 transitions. [2023-02-17 00:22:08,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 00:22:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 509 transitions. [2023-02-17 00:22:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 00:22:08,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:08,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:08,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-17 00:22:08,903 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 [2023-02-17 00:22:08,904 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1485657907, now seen corresponding path program 1 times [2023-02-17 00:22:08,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:08,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902672245] [2023-02-17 00:22:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:08,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:08,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:08,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:08,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:22:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 00:22:09,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:09,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902672245] [2023-02-17 00:22:09,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902672245] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:09,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307273105] [2023-02-17 00:22:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:09,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:09,012 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) [2023-02-17 00:22:09,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 00:22:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 00:22:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 00:22:09,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:22:09,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307273105] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:22:09,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:22:09,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-02-17 00:22:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841839986] [2023-02-17 00:22:09,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:22:09,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:22:09,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:22:09,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:22:09,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:22:09,101 INFO L87 Difference]: Start difference. First operand 368 states and 509 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:22:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:22:09,132 INFO L93 Difference]: Finished difference Result 534 states and 777 transitions. [2023-02-17 00:22:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:22:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-17 00:22:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:22:09,133 INFO L225 Difference]: With dead ends: 534 [2023-02-17 00:22:09,134 INFO L226 Difference]: Without dead ends: 384 [2023-02-17 00:22:09,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:22:09,135 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 2 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:22:09,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 293 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:22:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-17 00:22:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2023-02-17 00:22:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 306 states have (on average 1.2777777777777777) internal successors, (391), 318 states have internal predecessors, (391), 43 states have call successors, (43), 13 states have call predecessors, (43), 26 states have return successors, (83), 44 states have call predecessors, (83), 42 states have call successors, (83) [2023-02-17 00:22:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 517 transitions. [2023-02-17 00:22:09,170 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 517 transitions. Word has length 52 [2023-02-17 00:22:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:22:09,171 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 517 transitions. [2023-02-17 00:22:09,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 00:22:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 517 transitions. [2023-02-17 00:22:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 00:22:09,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:22:09,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:22:09,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 00:22:09,376 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 [2023-02-17 00:22:09,377 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:22:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:22:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash 676311281, now seen corresponding path program 1 times [2023-02-17 00:22:09,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:22:09,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900695641] [2023-02-17 00:22:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:22:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:22:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:09,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:22:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:09,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:22:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 00:22:09,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:22:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900695641] [2023-02-17 00:22:09,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900695641] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:22:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483023949] [2023-02-17 00:22:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:22:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:22:09,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:22:09,709 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) [2023-02-17 00:22:09,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 00:22:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:22:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 00:22:09,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:22:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 00:22:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:25:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 00:25:16,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483023949] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:25:16,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:25:16,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 22] total 49 [2023-02-17 00:25:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929388435] [2023-02-17 00:25:16,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:25:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-17 00:25:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:25:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-17 00:25:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2180, Unknown=19, NotChecked=0, Total=2352 [2023-02-17 00:25:16,978 INFO L87 Difference]: Start difference. First operand 376 states and 517 transitions. Second operand has 49 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 38 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-17 00:26:12,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 00:26:20,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 00:26:25,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]