./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_2a.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 f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:26:08,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:26:08,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:26:08,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:26:08,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:26:08,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:26:08,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:26:08,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:26:08,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:26:08,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:26:08,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:26:08,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:26:08,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:26:08,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:26:08,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:26:08,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:26:08,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:26:08,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:26:08,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:26:08,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:26:08,983 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:26:08,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:26:08,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:26:08,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:26:08,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:26:08,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:26:08,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:26:08,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:26:08,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:26:08,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:26:08,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:26:08,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:26:08,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:26:08,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:26:08,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:26:08,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:26:08,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:26:08,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:26:08,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:26:08,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:26:08,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:26:08,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:26:08,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:26:09,030 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:26:09,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:26:09,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:26:09,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:26:09,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:26:09,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:26:09,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:26:09,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:26:09,032 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:26:09,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:26:09,032 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:26:09,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:26:09,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:26:09,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:26:09,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:26:09,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:26:09,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:26:09,033 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:26:09,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:26:09,033 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:26:09,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:26:09,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:26:09,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:26:09,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:26:09,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:26:09,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:26:09,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:26:09,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:26:09,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:26:09,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:26:09,035 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:26:09,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:26:09,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:26:09,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2022-07-13 11:26:09,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:26:09,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:26:09,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:26:09,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:26:09,320 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:26:09,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2022-07-13 11:26:09,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b67a950b7/1f4f2b483f094cf7827f6e281c82064e/FLAGcba3bfe85 [2022-07-13 11:26:09,826 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:26:09,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2022-07-13 11:26:09,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b67a950b7/1f4f2b483f094cf7827f6e281c82064e/FLAGcba3bfe85 [2022-07-13 11:26:10,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b67a950b7/1f4f2b483f094cf7827f6e281c82064e [2022-07-13 11:26:10,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:26:10,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:26:10,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:26:10,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:26:10,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:26:10,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78294a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10, skipping insertion in model container [2022-07-13 11:26:10,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:26:10,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:26:10,367 WARN L230 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_2a.c.cil.c[728,741] [2022-07-13 11:26:10,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:26:10,417 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:26:10,427 WARN L230 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_2a.c.cil.c[728,741] [2022-07-13 11:26:10,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:26:10,465 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:26:10,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10 WrapperNode [2022-07-13 11:26:10,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:26:10,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:26:10,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:26:10,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:26:10,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,515 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 178 [2022-07-13 11:26:10,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:26:10,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:26:10,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:26:10,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:26:10,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:26:10,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:26:10,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:26:10,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:26:10,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (1/1) ... [2022-07-13 11:26:10,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:26:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:10,608 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) [2022-07-13 11:26:10,617 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 [2022-07-13 11:26:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:26:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:26:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-13 11:26:10,640 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-13 11:26:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:26:10,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:26:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 11:26:10,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 11:26:10,740 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:26:10,741 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:26:11,169 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:26:11,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:26:11,180 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:26:11,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:11 BoogieIcfgContainer [2022-07-13 11:26:11,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:26:11,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:26:11,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:26:11,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:26:11,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:26:10" (1/3) ... [2022-07-13 11:26:11,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a51a640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:11, skipping insertion in model container [2022-07-13 11:26:11,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:10" (2/3) ... [2022-07-13 11:26:11,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a51a640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:11, skipping insertion in model container [2022-07-13 11:26:11,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:11" (3/3) ... [2022-07-13 11:26:11,191 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2022-07-13 11:26:11,203 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:26:11,203 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:26:11,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:26:11,258 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5961eeac, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d498b78 [2022-07-13 11:26:11,259 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:26:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 81 states have internal predecessors, (135), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 11:26:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 11:26:11,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:11,275 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:11,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1735976372, now seen corresponding path program 1 times [2022-07-13 11:26:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:11,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942472146] [2022-07-13 11:26:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:26:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 11:26:11,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:11,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942472146] [2022-07-13 11:26:11,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942472146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:11,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:11,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:26:11,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243278769] [2022-07-13 11:26:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:11,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:26:11,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:26:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:11,615 INFO L87 Difference]: Start difference. First operand has 88 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 81 states have internal predecessors, (135), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:11,721 INFO L93 Difference]: Finished difference Result 225 states and 381 transitions. [2022-07-13 11:26:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:26:11,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-07-13 11:26:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:11,746 INFO L225 Difference]: With dead ends: 225 [2022-07-13 11:26:11,752 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 11:26:11,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:11,760 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 96 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:11,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 338 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 11:26:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-13 11:26:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 11:26:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 122 transitions. [2022-07-13 11:26:11,812 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 122 transitions. Word has length 42 [2022-07-13 11:26:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:11,813 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 122 transitions. [2022-07-13 11:26:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 122 transitions. [2022-07-13 11:26:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:26:11,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:11,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:11,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:26:11,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash 235851622, now seen corresponding path program 1 times [2022-07-13 11:26:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:11,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030364235] [2022-07-13 11:26:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:11,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:26:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 11:26:11,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:11,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030364235] [2022-07-13 11:26:11,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030364235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:11,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:11,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:26:11,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970214840] [2022-07-13 11:26:11,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:11,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:26:11,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:26:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:26:11,961 INFO L87 Difference]: Start difference. First operand 82 states and 122 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:12,022 INFO L93 Difference]: Finished difference Result 139 states and 208 transitions. [2022-07-13 11:26:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:26:12,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-07-13 11:26:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:12,030 INFO L225 Difference]: With dead ends: 139 [2022-07-13 11:26:12,030 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 11:26:12,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:26:12,037 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 151 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:12,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 437 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 11:26:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-13 11:26:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 75 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 11:26:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 121 transitions. [2022-07-13 11:26:12,049 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 121 transitions. Word has length 44 [2022-07-13 11:26:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:12,050 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 121 transitions. [2022-07-13 11:26:12,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 121 transitions. [2022-07-13 11:26:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:26:12,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:12,051 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:12,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:26:12,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -350954392, now seen corresponding path program 1 times [2022-07-13 11:26:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:12,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853318698] [2022-07-13 11:26:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:12,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:12,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:12,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:26:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:26:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:26:12,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:12,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853318698] [2022-07-13 11:26:12,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853318698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:12,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428212619] [2022-07-13 11:26:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:12,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:12,170 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) [2022-07-13 11:26:12,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:26:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:12,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 11:26:12,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 11:26:12,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 11:26:12,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428212619] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:12,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:12,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-07-13 11:26:12,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539072062] [2022-07-13 11:26:12,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:12,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 11:26:12,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:12,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 11:26:12,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:26:12,638 INFO L87 Difference]: Start difference. First operand 82 states and 121 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 11:26:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:13,218 INFO L93 Difference]: Finished difference Result 298 states and 478 transitions. [2022-07-13 11:26:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 11:26:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 44 [2022-07-13 11:26:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:13,221 INFO L225 Difference]: With dead ends: 298 [2022-07-13 11:26:13,221 INFO L226 Difference]: Without dead ends: 219 [2022-07-13 11:26:13,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:26:13,223 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 376 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:13,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 978 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:26:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-13 11:26:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 156. [2022-07-13 11:26:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 145 states have (on average 1.4827586206896552) internal successors, (215), 146 states have internal predecessors, (215), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-13 11:26:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 236 transitions. [2022-07-13 11:26:13,246 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 236 transitions. Word has length 44 [2022-07-13 11:26:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:13,247 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 236 transitions. [2022-07-13 11:26:13,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 11:26:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 236 transitions. [2022-07-13 11:26:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 11:26:13,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:13,250 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:13,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:13,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:13,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1691479718, now seen corresponding path program 1 times [2022-07-13 11:26:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:13,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221005614] [2022-07-13 11:26:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:13,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:26:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:26:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:26:13,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:13,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221005614] [2022-07-13 11:26:13,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221005614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:13,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623948707] [2022-07-13 11:26:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:13,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:13,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:13,563 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) [2022-07-13 11:26:13,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:26:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:26:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:26:13,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:26:13,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623948707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:13,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:26:13,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-13 11:26:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202689656] [2022-07-13 11:26:13,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:13,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:26:13,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:26:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:26:13,674 INFO L87 Difference]: Start difference. First operand 156 states and 236 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:13,726 INFO L93 Difference]: Finished difference Result 314 states and 477 transitions. [2022-07-13 11:26:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:26:13,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-13 11:26:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:13,729 INFO L225 Difference]: With dead ends: 314 [2022-07-13 11:26:13,729 INFO L226 Difference]: Without dead ends: 165 [2022-07-13 11:26:13,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:26:13,732 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 28 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:13,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 310 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-13 11:26:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-07-13 11:26:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.476510067114094) internal successors, (220), 151 states have internal predecessors, (220), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-13 11:26:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 244 transitions. [2022-07-13 11:26:13,760 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 244 transitions. Word has length 49 [2022-07-13 11:26:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:13,760 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 244 transitions. [2022-07-13 11:26:13,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 244 transitions. [2022-07-13 11:26:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 11:26:13,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:13,762 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-13 11:26:13,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:13,962 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,SelfDestructingSolverStorable3 [2022-07-13 11:26:13,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1041889728, now seen corresponding path program 1 times [2022-07-13 11:26:13,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:13,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518850186] [2022-07-13 11:26:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:13,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:13,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 11:26:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:26:14,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:14,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518850186] [2022-07-13 11:26:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518850186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529103916] [2022-07-13 11:26:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:14,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:14,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:14,072 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) [2022-07-13 11:26:14,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:26:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:26:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:26:14,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:26:14,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529103916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:14,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:14,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-07-13 11:26:14,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027197427] [2022-07-13 11:26:14,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:26:14,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:26:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:26:14,274 INFO L87 Difference]: Start difference. First operand 161 states and 244 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 11:26:14,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:14,647 INFO L93 Difference]: Finished difference Result 458 states and 734 transitions. [2022-07-13 11:26:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 11:26:14,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-07-13 11:26:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:14,653 INFO L225 Difference]: With dead ends: 458 [2022-07-13 11:26:14,653 INFO L226 Difference]: Without dead ends: 304 [2022-07-13 11:26:14,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:26:14,656 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 420 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:14,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 646 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:26:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-13 11:26:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 177. [2022-07-13 11:26:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.509090909090909) internal successors, (249), 167 states have internal predecessors, (249), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-13 11:26:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 273 transitions. [2022-07-13 11:26:14,687 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 273 transitions. Word has length 52 [2022-07-13 11:26:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:14,687 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 273 transitions. [2022-07-13 11:26:14,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 11:26:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 273 transitions. [2022-07-13 11:26:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 11:26:14,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:14,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:14,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 11:26:14,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:14,917 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1267071326, now seen corresponding path program 1 times [2022-07-13 11:26:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:14,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351319947] [2022-07-13 11:26:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:26:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:14,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 11:26:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:26:15,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351319947] [2022-07-13 11:26:15,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351319947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421095301] [2022-07-13 11:26:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:15,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:15,003 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) [2022-07-13 11:26:15,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:26:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 11:26:15,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:26:15,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 11:26:15,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421095301] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:15,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:26:15,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 7] total 14 [2022-07-13 11:26:15,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818715491] [2022-07-13 11:26:15,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:26:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:26:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:26:15,197 INFO L87 Difference]: Start difference. First operand 177 states and 273 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:15,244 INFO L93 Difference]: Finished difference Result 194 states and 291 transitions. [2022-07-13 11:26:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:26:15,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2022-07-13 11:26:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:15,246 INFO L225 Difference]: With dead ends: 194 [2022-07-13 11:26:15,246 INFO L226 Difference]: Without dead ends: 188 [2022-07-13 11:26:15,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:26:15,247 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 16 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:15,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 461 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-13 11:26:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-07-13 11:26:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 176 states have internal predecessors, (259), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-13 11:26:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 283 transitions. [2022-07-13 11:26:15,257 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 283 transitions. Word has length 56 [2022-07-13 11:26:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:15,257 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 283 transitions. [2022-07-13 11:26:15,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 283 transitions. [2022-07-13 11:26:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 11:26:15,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:15,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:15,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:15,480 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1324329628, now seen corresponding path program 1 times [2022-07-13 11:26:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:15,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079476698] [2022-07-13 11:26:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:26:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 11:26:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 11:26:15,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:15,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079476698] [2022-07-13 11:26:15,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079476698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:15,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:15,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:26:15,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542467965] [2022-07-13 11:26:15,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:15,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:26:15,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:26:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:26:15,555 INFO L87 Difference]: Start difference. First operand 186 states and 283 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:15,602 INFO L93 Difference]: Finished difference Result 212 states and 324 transitions. [2022-07-13 11:26:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:26:15,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2022-07-13 11:26:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:15,603 INFO L225 Difference]: With dead ends: 212 [2022-07-13 11:26:15,604 INFO L226 Difference]: Without dead ends: 201 [2022-07-13 11:26:15,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:26:15,605 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 38 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:15,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 668 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-13 11:26:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 181. [2022-07-13 11:26:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 169 states have (on average 1.4792899408284024) internal successors, (250), 171 states have internal predecessors, (250), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-13 11:26:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 274 transitions. [2022-07-13 11:26:15,616 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 274 transitions. Word has length 56 [2022-07-13 11:26:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:15,616 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 274 transitions. [2022-07-13 11:26:15,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 274 transitions. [2022-07-13 11:26:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:26:15,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:15,618 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-07-13 11:26:15,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:26:15,618 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash -475999289, now seen corresponding path program 1 times [2022-07-13 11:26:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:15,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213939432] [2022-07-13 11:26:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:26:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 11:26:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 11:26:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213939432] [2022-07-13 11:26:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213939432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971721334] [2022-07-13 11:26:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:15,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:15,732 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) [2022-07-13 11:26:15,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:26:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 11:26:15,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:26:15,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:26:15,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971721334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:15,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:15,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-07-13 11:26:15,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642378162] [2022-07-13 11:26:15,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:15,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 11:26:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 11:26:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:26:15,995 INFO L87 Difference]: Start difference. First operand 181 states and 274 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 12 states have internal predecessors, (88), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 11:26:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:16,978 INFO L93 Difference]: Finished difference Result 466 states and 730 transitions. [2022-07-13 11:26:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 11:26:16,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 12 states have internal predecessors, (88), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 58 [2022-07-13 11:26:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:16,981 INFO L225 Difference]: With dead ends: 466 [2022-07-13 11:26:16,981 INFO L226 Difference]: Without dead ends: 287 [2022-07-13 11:26:16,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=565, Invalid=1985, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 11:26:16,983 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 559 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:16,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 693 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:26:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-13 11:26:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 126. [2022-07-13 11:26:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 117 states have (on average 1.5042735042735043) internal successors, (176), 117 states have internal predecessors, (176), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 11:26:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-07-13 11:26:16,995 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 58 [2022-07-13 11:26:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:16,996 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-07-13 11:26:16,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 12 states have internal predecessors, (88), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 11:26:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-07-13 11:26:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 11:26:16,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:16,997 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:17,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:17,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:17,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -355472767, now seen corresponding path program 1 times [2022-07-13 11:26:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559214373] [2022-07-13 11:26:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:17,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:26:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 11:26:17,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:17,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559214373] [2022-07-13 11:26:17,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559214373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:17,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:17,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:26:17,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966360297] [2022-07-13 11:26:17,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:17,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:26:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:26:17,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:17,267 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:17,320 INFO L93 Difference]: Finished difference Result 199 states and 295 transitions. [2022-07-13 11:26:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:26:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2022-07-13 11:26:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:17,322 INFO L225 Difference]: With dead ends: 199 [2022-07-13 11:26:17,323 INFO L226 Difference]: Without dead ends: 158 [2022-07-13 11:26:17,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:17,324 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 49 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:17,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 291 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-13 11:26:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2022-07-13 11:26:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.4915254237288136) internal successors, (176), 118 states have internal predecessors, (176), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 11:26:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2022-07-13 11:26:17,332 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 73 [2022-07-13 11:26:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:17,332 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2022-07-13 11:26:17,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2022-07-13 11:26:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 11:26:17,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:17,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:26:17,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:26:17,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1607504626, now seen corresponding path program 1 times [2022-07-13 11:26:17,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:17,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223388352] [2022-07-13 11:26:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:26:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 11:26:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223388352] [2022-07-13 11:26:17,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223388352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:17,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:17,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:26:17,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271645169] [2022-07-13 11:26:17,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:26:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:26:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:26:17,434 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:17,524 INFO L93 Difference]: Finished difference Result 236 states and 345 transitions. [2022-07-13 11:26:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:26:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2022-07-13 11:26:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:17,526 INFO L225 Difference]: With dead ends: 236 [2022-07-13 11:26:17,526 INFO L226 Difference]: Without dead ends: 182 [2022-07-13 11:26:17,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:26:17,527 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 82 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:17,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 829 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-13 11:26:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2022-07-13 11:26:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 124 states have internal predecessors, (180), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 11:26:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 195 transitions. [2022-07-13 11:26:17,541 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 195 transitions. Word has length 76 [2022-07-13 11:26:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:17,542 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 195 transitions. [2022-07-13 11:26:17,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 195 transitions. [2022-07-13 11:26:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 11:26:17,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:17,543 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2022-07-13 11:26:17,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:26:17,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1656623811, now seen corresponding path program 1 times [2022-07-13 11:26:17,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:17,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324020676] [2022-07-13 11:26:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:17,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:26:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:26:17,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:17,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324020676] [2022-07-13 11:26:17,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324020676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:17,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:26:17,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:26:17,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620420119] [2022-07-13 11:26:17,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:17,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:26:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:26:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:17,608 INFO L87 Difference]: Start difference. First operand 133 states and 195 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:17,636 INFO L93 Difference]: Finished difference Result 186 states and 274 transitions. [2022-07-13 11:26:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:26:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 80 [2022-07-13 11:26:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:17,639 INFO L225 Difference]: With dead ends: 186 [2022-07-13 11:26:17,639 INFO L226 Difference]: Without dead ends: 153 [2022-07-13 11:26:17,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:17,640 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 35 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:17,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 305 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-13 11:26:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2022-07-13 11:26:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.4672131147540983) internal successors, (179), 124 states have internal predecessors, (179), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 11:26:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 194 transitions. [2022-07-13 11:26:17,651 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 194 transitions. Word has length 80 [2022-07-13 11:26:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:17,651 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 194 transitions. [2022-07-13 11:26:17,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 194 transitions. [2022-07-13 11:26:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 11:26:17,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:17,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2022-07-13 11:26:17,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:26:17,653 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1819933303, now seen corresponding path program 1 times [2022-07-13 11:26:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:17,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610254249] [2022-07-13 11:26:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:26:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:26:17,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610254249] [2022-07-13 11:26:17,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610254249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702321929] [2022-07-13 11:26:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:17,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:17,751 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) [2022-07-13 11:26:17,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:26:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:17,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:26:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:26:17,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:26:17,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702321929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:17,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:26:17,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-13 11:26:17,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022991152] [2022-07-13 11:26:17,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:26:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:26:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:26:17,910 INFO L87 Difference]: Start difference. First operand 133 states and 194 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:18,027 INFO L93 Difference]: Finished difference Result 270 states and 379 transitions. [2022-07-13 11:26:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:26:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 83 [2022-07-13 11:26:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:18,029 INFO L225 Difference]: With dead ends: 270 [2022-07-13 11:26:18,029 INFO L226 Difference]: Without dead ends: 228 [2022-07-13 11:26:18,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:26:18,030 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 225 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:18,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 963 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:26:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-13 11:26:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 161. [2022-07-13 11:26:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.4026845637583893) internal successors, (209), 151 states have internal predecessors, (209), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 11:26:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 226 transitions. [2022-07-13 11:26:18,040 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 226 transitions. Word has length 83 [2022-07-13 11:26:18,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:18,040 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 226 transitions. [2022-07-13 11:26:18,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:18,041 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 226 transitions. [2022-07-13 11:26:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 11:26:18,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:18,042 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2022-07-13 11:26:18,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:18,255 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 [2022-07-13 11:26:18,256 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash 551805959, now seen corresponding path program 1 times [2022-07-13 11:26:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:18,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138949751] [2022-07-13 11:26:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:18,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:18,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:18,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:18,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:26:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:26:18,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138949751] [2022-07-13 11:26:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138949751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871625696] [2022-07-13 11:26:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:18,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:18,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:18,353 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) [2022-07-13 11:26:18,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:26:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:18,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:26:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:26:18,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:26:18,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871625696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:18,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:18,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-13 11:26:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355778380] [2022-07-13 11:26:18,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:18,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 11:26:18,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:18,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 11:26:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:26:18,609 INFO L87 Difference]: Start difference. First operand 161 states and 226 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:26:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:18,785 INFO L93 Difference]: Finished difference Result 368 states and 513 transitions. [2022-07-13 11:26:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:26:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2022-07-13 11:26:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:18,787 INFO L225 Difference]: With dead ends: 368 [2022-07-13 11:26:18,787 INFO L226 Difference]: Without dead ends: 283 [2022-07-13 11:26:18,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:26:18,788 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 177 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:18,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2803 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:26:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-13 11:26:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 158. [2022-07-13 11:26:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 147 states have (on average 1.380952380952381) internal successors, (203), 148 states have internal predecessors, (203), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 11:26:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 217 transitions. [2022-07-13 11:26:18,799 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 217 transitions. Word has length 83 [2022-07-13 11:26:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:18,800 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 217 transitions. [2022-07-13 11:26:18,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:26:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 217 transitions. [2022-07-13 11:26:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 11:26:18,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:18,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2022-07-13 11:26:18,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:19,027 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 [2022-07-13 11:26:19,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -66223114, now seen corresponding path program 2 times [2022-07-13 11:26:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:19,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505801377] [2022-07-13 11:26:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 11:26:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:26:19,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505801377] [2022-07-13 11:26:19,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505801377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511649996] [2022-07-13 11:26:19,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:26:19,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:19,123 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) [2022-07-13 11:26:19,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:26:19,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 11:26:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:26:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 11:26:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 11:26:19,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:26:19,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511649996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:19,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:26:19,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2022-07-13 11:26:19,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416907459] [2022-07-13 11:26:19,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:19,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:26:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:26:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:26:19,283 INFO L87 Difference]: Start difference. First operand 158 states and 217 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:19,488 INFO L93 Difference]: Finished difference Result 312 states and 426 transitions. [2022-07-13 11:26:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:26:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 87 [2022-07-13 11:26:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:19,489 INFO L225 Difference]: With dead ends: 312 [2022-07-13 11:26:19,490 INFO L226 Difference]: Without dead ends: 271 [2022-07-13 11:26:19,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:26:19,491 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 295 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:19,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1091 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:26:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-13 11:26:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 168. [2022-07-13 11:26:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 157 states have (on average 1.356687898089172) internal successors, (213), 158 states have internal predecessors, (213), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 11:26:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2022-07-13 11:26:19,500 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 87 [2022-07-13 11:26:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:19,501 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2022-07-13 11:26:19,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:26:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2022-07-13 11:26:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 11:26:19,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:19,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2022-07-13 11:26:19,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:19,715 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 [2022-07-13 11:26:19,715 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 152631604, now seen corresponding path program 1 times [2022-07-13 11:26:19,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:19,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894775159] [2022-07-13 11:26:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:19,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:26:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 11:26:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:26:19,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:19,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894775159] [2022-07-13 11:26:19,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894775159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:19,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37665416] [2022-07-13 11:26:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:19,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:19,822 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) [2022-07-13 11:26:19,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 11:26:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:26:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:19,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:26:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37665416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:20,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:20,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 11:26:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092877790] [2022-07-13 11:26:20,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:26:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:26:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:26:20,047 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 11:26:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:22,770 INFO L93 Difference]: Finished difference Result 477 states and 689 transitions. [2022-07-13 11:26:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 11:26:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-07-13 11:26:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:22,772 INFO L225 Difference]: With dead ends: 477 [2022-07-13 11:26:22,772 INFO L226 Difference]: Without dead ends: 318 [2022-07-13 11:26:22,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=344, Invalid=845, Unknown=1, NotChecked=0, Total=1190 [2022-07-13 11:26:22,773 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 398 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:22,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 583 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:26:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-13 11:26:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 172. [2022-07-13 11:26:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 161 states have (on average 1.3354037267080745) internal successors, (215), 162 states have internal predecessors, (215), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 11:26:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 229 transitions. [2022-07-13 11:26:22,787 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 229 transitions. Word has length 87 [2022-07-13 11:26:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:22,788 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 229 transitions. [2022-07-13 11:26:22,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 11:26:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 229 transitions. [2022-07-13 11:26:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-13 11:26:22,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:22,789 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-13 11:26:22,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:23,014 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 [2022-07-13 11:26:23,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1886336854, now seen corresponding path program 1 times [2022-07-13 11:26:23,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:23,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998550336] [2022-07-13 11:26:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:23,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:23,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:23,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 11:26:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:23,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 11:26:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:26:23,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:23,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998550336] [2022-07-13 11:26:23,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998550336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:23,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153853910] [2022-07-13 11:26:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:23,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:23,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:23,113 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) [2022-07-13 11:26:23,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 11:26:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:26:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:26:23,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:26:23,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153853910] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:23,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:23,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-07-13 11:26:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049147177] [2022-07-13 11:26:23,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:23,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 11:26:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 11:26:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:26:23,398 INFO L87 Difference]: Start difference. First operand 172 states and 229 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 11:26:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:24,010 INFO L93 Difference]: Finished difference Result 625 states and 909 transitions. [2022-07-13 11:26:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 11:26:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2022-07-13 11:26:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:24,013 INFO L225 Difference]: With dead ends: 625 [2022-07-13 11:26:24,013 INFO L226 Difference]: Without dead ends: 456 [2022-07-13 11:26:24,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=679, Invalid=1391, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 11:26:24,015 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 988 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:24,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 831 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:26:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-13 11:26:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 193. [2022-07-13 11:26:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 182 states have (on average 1.3516483516483517) internal successors, (246), 183 states have internal predecessors, (246), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 11:26:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 260 transitions. [2022-07-13 11:26:24,034 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 260 transitions. Word has length 89 [2022-07-13 11:26:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:24,034 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 260 transitions. [2022-07-13 11:26:24,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 11:26:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 260 transitions. [2022-07-13 11:26:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 11:26:24,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:24,036 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-13 11:26:24,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:24,250 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,SelfDestructingSolverStorable15 [2022-07-13 11:26:24,251 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:24,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1033497780, now seen corresponding path program 2 times [2022-07-13 11:26:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:24,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696695973] [2022-07-13 11:26:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:24,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:24,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 11:26:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:24,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-13 11:26:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 11:26:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696695973] [2022-07-13 11:26:24,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696695973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192575165] [2022-07-13 11:26:24,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:26:24,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:24,416 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) [2022-07-13 11:26:24,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 11:26:24,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:26:24,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:26:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:26:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-13 11:26:24,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 11:26:25,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192575165] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:25,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:25,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-07-13 11:26:25,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391085256] [2022-07-13 11:26:25,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:25,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 11:26:25,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:25,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 11:26:25,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-07-13 11:26:25,077 INFO L87 Difference]: Start difference. First operand 193 states and 260 transitions. Second operand has 29 states, 29 states have (on average 4.0) internal successors, (116), 24 states have internal predecessors, (116), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 11:26:26,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:26,917 INFO L93 Difference]: Finished difference Result 496 states and 711 transitions. [2022-07-13 11:26:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 11:26:26,918 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 24 states have internal predecessors, (116), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) Word has length 99 [2022-07-13 11:26:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:26,921 INFO L225 Difference]: With dead ends: 496 [2022-07-13 11:26:26,921 INFO L226 Difference]: Without dead ends: 304 [2022-07-13 11:26:26,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=866, Invalid=4390, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 11:26:26,925 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 895 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:26,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 1159 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:26:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-13 11:26:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 193. [2022-07-13 11:26:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 182 states have (on average 1.3516483516483517) internal successors, (246), 183 states have internal predecessors, (246), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 11:26:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2022-07-13 11:26:26,953 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 99 [2022-07-13 11:26:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:26,954 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2022-07-13 11:26:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 24 states have internal predecessors, (116), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 11:26:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2022-07-13 11:26:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 11:26:26,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:26,956 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-13 11:26:26,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 11:26:27,161 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:27,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1305340779, now seen corresponding path program 1 times [2022-07-13 11:26:27,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:27,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918908849] [2022-07-13 11:26:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:27,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 11:26:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-13 11:26:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-13 11:26:27,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:27,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918908849] [2022-07-13 11:26:27,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918908849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:27,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142259579] [2022-07-13 11:26:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:27,234 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) [2022-07-13 11:26:27,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 11:26:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:26:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-13 11:26:27,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:26:27,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142259579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:27,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:26:27,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-13 11:26:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930246063] [2022-07-13 11:26:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:27,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:26:27,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:26:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:27,320 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:27,362 INFO L93 Difference]: Finished difference Result 396 states and 544 transitions. [2022-07-13 11:26:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:26:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 104 [2022-07-13 11:26:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:27,363 INFO L225 Difference]: With dead ends: 396 [2022-07-13 11:26:27,364 INFO L226 Difference]: Without dead ends: 212 [2022-07-13 11:26:27,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:26:27,365 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 10 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:27,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 200 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-13 11:26:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2022-07-13 11:26:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 184 states have (on average 1.3478260869565217) internal successors, (248), 185 states have internal predecessors, (248), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 11:26:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 261 transitions. [2022-07-13 11:26:27,378 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 261 transitions. Word has length 104 [2022-07-13 11:26:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:27,378 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 261 transitions. [2022-07-13 11:26:27,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 261 transitions. [2022-07-13 11:26:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-13 11:26:27,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:27,380 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 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, 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] [2022-07-13 11:26:27,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:27,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 11:26:27,596 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1414826554, now seen corresponding path program 1 times [2022-07-13 11:26:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:27,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792829768] [2022-07-13 11:26:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:27,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 11:26:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 11:26:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:27,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:27,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792829768] [2022-07-13 11:26:27,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792829768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:27,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698088234] [2022-07-13 11:26:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:27,739 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) [2022-07-13 11:26:27,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 11:26:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 11:26:27,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:27,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:27,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698088234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:27,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:27,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-13 11:26:27,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514449541] [2022-07-13 11:26:27,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:27,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:26:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:26:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:26:27,969 INFO L87 Difference]: Start difference. First operand 195 states and 261 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 9 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:28,238 INFO L93 Difference]: Finished difference Result 526 states and 723 transitions. [2022-07-13 11:26:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 11:26:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 9 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 105 [2022-07-13 11:26:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:28,241 INFO L225 Difference]: With dead ends: 526 [2022-07-13 11:26:28,241 INFO L226 Difference]: Without dead ends: 493 [2022-07-13 11:26:28,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:26:28,242 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 450 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:28,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1622 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:26:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-07-13 11:26:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 241. [2022-07-13 11:26:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 227 states have (on average 1.2995594713656389) internal successors, (295), 228 states have internal predecessors, (295), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-13 11:26:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2022-07-13 11:26:28,264 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 105 [2022-07-13 11:26:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:28,265 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2022-07-13 11:26:28,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 9 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2022-07-13 11:26:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-13 11:26:28,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:28,267 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 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, 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] [2022-07-13 11:26:28,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:28,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:28,479 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash -579318152, now seen corresponding path program 1 times [2022-07-13 11:26:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:28,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076497456] [2022-07-13 11:26:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:28,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:28,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:28,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 11:26:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:28,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 11:26:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:28,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:28,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076497456] [2022-07-13 11:26:28,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076497456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:28,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837906201] [2022-07-13 11:26:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:28,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:28,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:28,580 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) [2022-07-13 11:26:28,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 11:26:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:28,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 11:26:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 11:26:28,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 11:26:28,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837906201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:28,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:28,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-13 11:26:28,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138999146] [2022-07-13 11:26:28,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:28,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 11:26:28,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 11:26:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:26:28,961 INFO L87 Difference]: Start difference. First operand 241 states and 319 transitions. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 11:26:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:29,768 INFO L93 Difference]: Finished difference Result 634 states and 892 transitions. [2022-07-13 11:26:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 11:26:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2022-07-13 11:26:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:29,772 INFO L225 Difference]: With dead ends: 634 [2022-07-13 11:26:29,772 INFO L226 Difference]: Without dead ends: 555 [2022-07-13 11:26:29,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 11:26:29,773 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 911 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:29,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 1375 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:26:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-13 11:26:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 244. [2022-07-13 11:26:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 227 states have (on average 1.2907488986784141) internal successors, (293), 228 states have internal predecessors, (293), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (32), 11 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-13 11:26:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 332 transitions. [2022-07-13 11:26:29,801 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 332 transitions. Word has length 105 [2022-07-13 11:26:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:29,801 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 332 transitions. [2022-07-13 11:26:29,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 11:26:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 332 transitions. [2022-07-13 11:26:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-13 11:26:29,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:29,804 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 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, 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] [2022-07-13 11:26:29,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:30,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:30,028 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1689586168, now seen corresponding path program 1 times [2022-07-13 11:26:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984078787] [2022-07-13 11:26:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 11:26:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 11:26:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:30,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984078787] [2022-07-13 11:26:30,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984078787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247002703] [2022-07-13 11:26:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:30,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:30,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:30,115 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:30,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 11:26:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:26:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:30,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:30,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247002703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:30,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:30,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-07-13 11:26:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130046872] [2022-07-13 11:26:30,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:30,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:26:30,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:26:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:26:30,307 INFO L87 Difference]: Start difference. First operand 244 states and 332 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:30,475 INFO L93 Difference]: Finished difference Result 378 states and 525 transitions. [2022-07-13 11:26:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:26:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 105 [2022-07-13 11:26:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:30,478 INFO L225 Difference]: With dead ends: 378 [2022-07-13 11:26:30,478 INFO L226 Difference]: Without dead ends: 303 [2022-07-13 11:26:30,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:26:30,479 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 159 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:30,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1180 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:26:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-13 11:26:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 230. [2022-07-13 11:26:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 214 states have (on average 1.308411214953271) internal successors, (280), 217 states have internal predecessors, (280), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (23), 8 states have call predecessors, (23), 5 states have call successors, (23) [2022-07-13 11:26:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 309 transitions. [2022-07-13 11:26:30,510 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 309 transitions. Word has length 105 [2022-07-13 11:26:30,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:30,511 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 309 transitions. [2022-07-13 11:26:30,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 309 transitions. [2022-07-13 11:26:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 11:26:30,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:30,513 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 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, 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] [2022-07-13 11:26:30,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:30,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:30,742 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:30,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1197064006, now seen corresponding path program 1 times [2022-07-13 11:26:30,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:30,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361250610] [2022-07-13 11:26:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:30,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 11:26:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 11:26:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-13 11:26:30,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:30,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361250610] [2022-07-13 11:26:30,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361250610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:30,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718754328] [2022-07-13 11:26:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:30,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:30,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:30,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 11:26:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:30,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:26:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-13 11:26:30,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:26:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718754328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:26:30,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:26:30,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-13 11:26:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485228823] [2022-07-13 11:26:30,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:26:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:26:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:26:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:26:30,886 INFO L87 Difference]: Start difference. First operand 230 states and 309 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:30,960 INFO L93 Difference]: Finished difference Result 476 states and 654 transitions. [2022-07-13 11:26:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:26:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 106 [2022-07-13 11:26:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:30,962 INFO L225 Difference]: With dead ends: 476 [2022-07-13 11:26:30,962 INFO L226 Difference]: Without dead ends: 255 [2022-07-13 11:26:30,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:26:30,964 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 14 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:30,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 316 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:26:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-13 11:26:30,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 235. [2022-07-13 11:26:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 219 states have (on average 1.3150684931506849) internal successors, (288), 222 states have internal predecessors, (288), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (23), 8 states have call predecessors, (23), 5 states have call successors, (23) [2022-07-13 11:26:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 317 transitions. [2022-07-13 11:26:30,989 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 317 transitions. Word has length 106 [2022-07-13 11:26:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:30,990 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 317 transitions. [2022-07-13 11:26:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:26:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 317 transitions. [2022-07-13 11:26:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-13 11:26:30,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:26:30,992 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2022-07-13 11:26:31,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:31,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 11:26:31,215 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:26:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:26:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1599024705, now seen corresponding path program 1 times [2022-07-13 11:26:31,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:26:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655664162] [2022-07-13 11:26:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:26:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:31,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:26:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:31,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:26:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 11:26:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:31,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 11:26:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 11:26:31,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:26:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655664162] [2022-07-13 11:26:31,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655664162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:26:31,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335495429] [2022-07-13 11:26:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:26:31,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:26:31,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:26:31,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 11:26:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:26:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 11:26:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:26:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-13 11:26:31,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:26:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-13 11:26:33,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335495429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:26:33,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:26:33,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 27 [2022-07-13 11:26:33,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460370836] [2022-07-13 11:26:33,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:26:33,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 11:26:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:26:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 11:26:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-07-13 11:26:33,112 INFO L87 Difference]: Start difference. First operand 235 states and 317 transitions. Second operand has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 23 states have internal predecessors, (118), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-13 11:26:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:26:35,067 INFO L93 Difference]: Finished difference Result 547 states and 789 transitions. [2022-07-13 11:26:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-13 11:26:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 23 states have internal predecessors, (118), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) Word has length 107 [2022-07-13 11:26:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:26:35,068 INFO L225 Difference]: With dead ends: 547 [2022-07-13 11:26:35,068 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 11:26:35,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=846, Invalid=4266, Unknown=0, NotChecked=0, Total=5112 [2022-07-13 11:26:35,072 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 564 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:26:35,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 426 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:26:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 11:26:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 11:26:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:26:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 11:26:35,073 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2022-07-13 11:26:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:26:35,073 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 11:26:35,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 23 states have internal predecessors, (118), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-13 11:26:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 11:26:35,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 11:26:35,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 11:26:35,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 11:26:35,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:26:35,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 11:26:59,568 WARN L233 SmtUtils]: Spent 20.71s on a formula simplification. DAG size of input: 136 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)