./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 6c24879c 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-?-6c24879 [2022-07-11 23:40:58,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:40:58,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:40:59,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:40:59,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:40:59,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:40:59,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:40:59,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:40:59,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:40:59,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:40:59,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:40:59,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:40:59,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:40:59,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:40:59,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:40:59,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:40:59,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:40:59,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:40:59,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:40:59,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:40:59,055 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:40:59,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:40:59,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:40:59,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:40:59,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:40:59,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:40:59,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:40:59,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:40:59,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:40:59,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:40:59,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:40:59,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:40:59,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:40:59,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:40:59,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:40:59,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:40:59,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:40:59,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:40:59,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:40:59,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:40:59,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:40:59,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:40:59,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:40:59,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:40:59,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:40:59,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:40:59,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:40:59,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:40:59,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:40:59,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:40:59,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:40:59,115 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:40:59,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:40:59,116 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:40:59,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:40:59,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:40:59,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:40:59,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:40:59,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:40:59,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:40:59,117 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:40:59,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:40:59,118 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:40:59,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:40:59,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:40:59,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:40:59,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:40:59,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:40:59,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:40:59,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:40:59,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:40:59,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:40:59,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:40:59,121 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:40:59,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:40:59,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:40:59,121 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2022-07-11 23:40:59,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:40:59,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:40:59,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:40:59,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:40:59,382 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:40:59,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2022-07-11 23:40:59,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ac65f9b/1a755566e6fd426f88a217674814d162/FLAGa03fc429b [2022-07-11 23:40:59,907 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:40:59,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2022-07-11 23:40:59,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ac65f9b/1a755566e6fd426f88a217674814d162/FLAGa03fc429b [2022-07-11 23:41:00,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ac65f9b/1a755566e6fd426f88a217674814d162 [2022-07-11 23:41:00,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:41:00,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:41:00,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:41:00,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:41:00,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:41:00,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a748fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00, skipping insertion in model container [2022-07-11 23:41:00,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:41:00,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:41:00,609 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] [2022-07-11 23:41:00,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:41:00,665 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:41:00,673 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] [2022-07-11 23:41:00,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:41:00,716 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:41:00,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00 WrapperNode [2022-07-11 23:41:00,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:41:00,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:41:00,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:41:00,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:41:00,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,765 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 178 [2022-07-11 23:41:00,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:41:00,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:41:00,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:41:00,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:41:00,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:41:00,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:41:00,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:41:00,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:41:00,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (1/1) ... [2022-07-11 23:41:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:41:00,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:00,853 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) [2022-07-11 23:41:00,862 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 [2022-07-11 23:41:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:41:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:41:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-11 23:41:00,889 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-11 23:41:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:41:00,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:41:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-11 23:41:00,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-11 23:41:00,955 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:41:00,956 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:41:01,424 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:41:01,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:41:01,444 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 23:41:01,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:41:01 BoogieIcfgContainer [2022-07-11 23:41:01,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:41:01,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:41:01,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:41:01,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:41:01,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:41:00" (1/3) ... [2022-07-11 23:41:01,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b7e499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:41:01, skipping insertion in model container [2022-07-11 23:41:01,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:41:00" (2/3) ... [2022-07-11 23:41:01,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b7e499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:41:01, skipping insertion in model container [2022-07-11 23:41:01,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:41:01" (3/3) ... [2022-07-11 23:41:01,455 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2022-07-11 23:41:01,474 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:41:01,474 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:41:01,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:41:01,555 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@2948f429, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c608858 [2022-07-11 23:41:01,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:41:01,559 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) [2022-07-11 23:41:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:41:01,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:01,574 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] [2022-07-11 23:41:01,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1735976372, now seen corresponding path program 1 times [2022-07-11 23:41:01,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:01,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390749249] [2022-07-11 23:41:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:01,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:01,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:01,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:41:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:41:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:41:01,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:01,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390749249] [2022-07-11 23:41:01,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390749249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:01,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:01,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:01,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176219804] [2022-07-11 23:41:01,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:01,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:01,993 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) [2022-07-11 23:41:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:02,107 INFO L93 Difference]: Finished difference Result 225 states and 381 transitions. [2022-07-11 23:41:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:02,110 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 [2022-07-11 23:41:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:02,120 INFO L225 Difference]: With dead ends: 225 [2022-07-11 23:41:02,120 INFO L226 Difference]: Without dead ends: 90 [2022-07-11 23:41:02,124 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 [2022-07-11 23:41:02,127 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 [2022-07-11 23:41:02,129 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] [2022-07-11 23:41:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-11 23:41:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-11 23:41:02,171 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) [2022-07-11 23:41:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 122 transitions. [2022-07-11 23:41:02,180 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 122 transitions. Word has length 42 [2022-07-11 23:41:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:02,182 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 122 transitions. [2022-07-11 23:41:02,182 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) [2022-07-11 23:41:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 122 transitions. [2022-07-11 23:41:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:41:02,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:02,189 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] [2022-07-11 23:41:02,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:41:02,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash 235851622, now seen corresponding path program 1 times [2022-07-11 23:41:02,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:02,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326011774] [2022-07-11 23:41:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:02,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:41:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:41:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:41:02,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:02,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326011774] [2022-07-11 23:41:02,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326011774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:02,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:02,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:41:02,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119295521] [2022-07-11 23:41:02,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:02,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:41:02,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:41:02,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:41:02,320 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) [2022-07-11 23:41:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:02,360 INFO L93 Difference]: Finished difference Result 139 states and 208 transitions. [2022-07-11 23:41:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:02,361 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 [2022-07-11 23:41:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:02,363 INFO L225 Difference]: With dead ends: 139 [2022-07-11 23:41:02,363 INFO L226 Difference]: Without dead ends: 90 [2022-07-11 23:41:02,364 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 [2022-07-11 23:41:02,365 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 [2022-07-11 23:41:02,365 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] [2022-07-11 23:41:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-11 23:41:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-11 23:41:02,373 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) [2022-07-11 23:41:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 121 transitions. [2022-07-11 23:41:02,374 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 121 transitions. Word has length 44 [2022-07-11 23:41:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:02,375 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 121 transitions. [2022-07-11 23:41:02,375 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) [2022-07-11 23:41:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 121 transitions. [2022-07-11 23:41:02,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:41:02,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:02,377 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] [2022-07-11 23:41:02,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:41:02,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash -350954392, now seen corresponding path program 1 times [2022-07-11 23:41:02,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:02,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951736606] [2022-07-11 23:41:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:41:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:41:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:41:02,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951736606] [2022-07-11 23:41:02,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951736606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:02,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830634475] [2022-07-11 23:41:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:02,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:02,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:02,493 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) [2022-07-11 23:41:02,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:41:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 23:41:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:41:02,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:41:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830634475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:03,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:03,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-07-11 23:41:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288387035] [2022-07-11 23:41:03,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:03,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 23:41:03,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 23:41:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:41:03,043 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) [2022-07-11 23:41:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:03,710 INFO L93 Difference]: Finished difference Result 298 states and 478 transitions. [2022-07-11 23:41:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 23:41:03,711 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 [2022-07-11 23:41:03,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:03,714 INFO L225 Difference]: With dead ends: 298 [2022-07-11 23:41:03,717 INFO L226 Difference]: Without dead ends: 219 [2022-07-11 23:41:03,719 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 [2022-07-11 23:41:03,720 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:03,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 978 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:41:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-11 23:41:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 156. [2022-07-11 23:41:03,743 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) [2022-07-11 23:41:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 236 transitions. [2022-07-11 23:41:03,744 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 236 transitions. Word has length 44 [2022-07-11 23:41:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:03,745 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 236 transitions. [2022-07-11 23:41:03,745 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) [2022-07-11 23:41:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 236 transitions. [2022-07-11 23:41:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:41:03,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:03,747 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] [2022-07-11 23:41:03,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:03,971 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 [2022-07-11 23:41:03,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1691479718, now seen corresponding path program 1 times [2022-07-11 23:41:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:03,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202745609] [2022-07-11 23:41:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 23:41:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:41:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:41:04,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:04,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202745609] [2022-07-11 23:41:04,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202745609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:04,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957976813] [2022-07-11 23:41:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:04,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:04,063 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) [2022-07-11 23:41:04,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:41:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:41:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:41:04,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:04,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957976813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:04,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:04,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-11 23:41:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574571362] [2022-07-11 23:41:04,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:41:04,182 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) [2022-07-11 23:41:04,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:04,244 INFO L93 Difference]: Finished difference Result 314 states and 477 transitions. [2022-07-11 23:41:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:04,245 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 [2022-07-11 23:41:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:04,246 INFO L225 Difference]: With dead ends: 314 [2022-07-11 23:41:04,247 INFO L226 Difference]: Without dead ends: 165 [2022-07-11 23:41:04,247 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 [2022-07-11 23:41:04,248 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 [2022-07-11 23:41:04,249 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] [2022-07-11 23:41:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-11 23:41:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-07-11 23:41:04,266 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) [2022-07-11 23:41:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 244 transitions. [2022-07-11 23:41:04,268 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 244 transitions. Word has length 49 [2022-07-11 23:41:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:04,268 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 244 transitions. [2022-07-11 23:41:04,268 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) [2022-07-11 23:41:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 244 transitions. [2022-07-11 23:41:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:41:04,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:04,271 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] [2022-07-11 23:41:04,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:04,484 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 [2022-07-11 23:41:04,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1041889728, now seen corresponding path program 1 times [2022-07-11 23:41:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:04,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130253834] [2022-07-11 23:41:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:04,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-11 23:41:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:41:04,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:04,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130253834] [2022-07-11 23:41:04,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130253834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:04,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935931156] [2022-07-11 23:41:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:04,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:04,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:04,595 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) [2022-07-11 23:41:04,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:41:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 23:41:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:41:04,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:41:04,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935931156] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:04,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:04,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-07-11 23:41:04,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658078102] [2022-07-11 23:41:04,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:04,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:41:04,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:04,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:41:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:41:04,824 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) [2022-07-11 23:41:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:05,181 INFO L93 Difference]: Finished difference Result 458 states and 734 transitions. [2022-07-11 23:41:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 23:41:05,182 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 [2022-07-11 23:41:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:05,185 INFO L225 Difference]: With dead ends: 458 [2022-07-11 23:41:05,185 INFO L226 Difference]: Without dead ends: 304 [2022-07-11 23:41:05,186 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 [2022-07-11 23:41:05,187 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 [2022-07-11 23:41:05,187 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] [2022-07-11 23:41:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-11 23:41:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 177. [2022-07-11 23:41:05,210 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) [2022-07-11 23:41:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 273 transitions. [2022-07-11 23:41:05,211 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 273 transitions. Word has length 52 [2022-07-11 23:41:05,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:05,212 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 273 transitions. [2022-07-11 23:41:05,212 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) [2022-07-11 23:41:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 273 transitions. [2022-07-11 23:41:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 23:41:05,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:05,215 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] [2022-07-11 23:41:05,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:05,435 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 [2022-07-11 23:41:05,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1267071326, now seen corresponding path program 1 times [2022-07-11 23:41:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:05,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109994180] [2022-07-11 23:41:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:41:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 23:41:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:41:05,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:05,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109994180] [2022-07-11 23:41:05,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109994180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229113668] [2022-07-11 23:41:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:05,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:05,537 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) [2022-07-11 23:41:05,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:41:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:05,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:41:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:41:05,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:41:05,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229113668] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:05,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:41:05,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 7] total 14 [2022-07-11 23:41:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896974096] [2022-07-11 23:41:05,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:05,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:41:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:05,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:41:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:41:05,734 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) [2022-07-11 23:41:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:05,783 INFO L93 Difference]: Finished difference Result 194 states and 291 transitions. [2022-07-11 23:41:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:05,786 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 [2022-07-11 23:41:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:05,794 INFO L225 Difference]: With dead ends: 194 [2022-07-11 23:41:05,794 INFO L226 Difference]: Without dead ends: 188 [2022-07-11 23:41:05,795 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 [2022-07-11 23:41:05,797 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 [2022-07-11 23:41:05,798 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] [2022-07-11 23:41:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-11 23:41:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-07-11 23:41:05,812 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) [2022-07-11 23:41:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 283 transitions. [2022-07-11 23:41:05,814 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 283 transitions. Word has length 56 [2022-07-11 23:41:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:05,814 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 283 transitions. [2022-07-11 23:41:05,814 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) [2022-07-11 23:41:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 283 transitions. [2022-07-11 23:41:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 23:41:05,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:05,826 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] [2022-07-11 23:41:05,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-11 23:41:06,039 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 [2022-07-11 23:41:06,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:06,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1324329628, now seen corresponding path program 1 times [2022-07-11 23:41:06,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:06,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896450897] [2022-07-11 23:41:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:06,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:41:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 23:41:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:41:06,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896450897] [2022-07-11 23:41:06,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896450897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:06,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:06,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:41:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686242359] [2022-07-11 23:41:06,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:06,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:41:06,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:41:06,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:41:06,122 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) [2022-07-11 23:41:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:06,167 INFO L93 Difference]: Finished difference Result 212 states and 324 transitions. [2022-07-11 23:41:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:41:06,168 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 [2022-07-11 23:41:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:06,169 INFO L225 Difference]: With dead ends: 212 [2022-07-11 23:41:06,170 INFO L226 Difference]: Without dead ends: 201 [2022-07-11 23:41:06,170 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 [2022-07-11 23:41:06,171 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 [2022-07-11 23:41:06,171 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] [2022-07-11 23:41:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-11 23:41:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 181. [2022-07-11 23:41:06,181 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) [2022-07-11 23:41:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 274 transitions. [2022-07-11 23:41:06,183 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 274 transitions. Word has length 56 [2022-07-11 23:41:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:06,184 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 274 transitions. [2022-07-11 23:41:06,184 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) [2022-07-11 23:41:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 274 transitions. [2022-07-11 23:41:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:41:06,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:06,185 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] [2022-07-11 23:41:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:41:06,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash -475999289, now seen corresponding path program 1 times [2022-07-11 23:41:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:06,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690496502] [2022-07-11 23:41:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:41:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-11 23:41:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:41:06,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690496502] [2022-07-11 23:41:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690496502] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3084269] [2022-07-11 23:41:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:06,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:06,295 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) [2022-07-11 23:41:06,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:41:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:41:06,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:41:06,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:41:06,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3084269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:06,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:06,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-07-11 23:41:06,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558436302] [2022-07-11 23:41:06,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:06,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:41:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:41:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:41:06,553 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) [2022-07-11 23:41:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:07,524 INFO L93 Difference]: Finished difference Result 466 states and 730 transitions. [2022-07-11 23:41:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-11 23:41:07,525 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 [2022-07-11 23:41:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:07,527 INFO L225 Difference]: With dead ends: 466 [2022-07-11 23:41:07,527 INFO L226 Difference]: Without dead ends: 287 [2022-07-11 23:41:07,529 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 [2022-07-11 23:41:07,530 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 [2022-07-11 23:41:07,530 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] [2022-07-11 23:41:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-11 23:41:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 126. [2022-07-11 23:41:07,544 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) [2022-07-11 23:41:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-07-11 23:41:07,546 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 58 [2022-07-11 23:41:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:07,547 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-07-11 23:41:07,547 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) [2022-07-11 23:41:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-07-11 23:41:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-11 23:41:07,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:07,549 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] [2022-07-11 23:41:07,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:07,770 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 [2022-07-11 23:41:07,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -355472767, now seen corresponding path program 1 times [2022-07-11 23:41:07,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:07,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80289981] [2022-07-11 23:41:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:41:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:41:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80289981] [2022-07-11 23:41:07,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80289981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:07,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:07,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:07,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984090359] [2022-07-11 23:41:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:07,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:07,843 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) [2022-07-11 23:41:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:07,901 INFO L93 Difference]: Finished difference Result 199 states and 295 transitions. [2022-07-11 23:41:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:07,901 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 [2022-07-11 23:41:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:07,903 INFO L225 Difference]: With dead ends: 199 [2022-07-11 23:41:07,903 INFO L226 Difference]: Without dead ends: 158 [2022-07-11 23:41:07,903 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 [2022-07-11 23:41:07,905 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 [2022-07-11 23:41:07,905 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] [2022-07-11 23:41:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-11 23:41:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2022-07-11 23:41:07,916 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) [2022-07-11 23:41:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2022-07-11 23:41:07,917 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 73 [2022-07-11 23:41:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:07,918 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2022-07-11 23:41:07,918 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) [2022-07-11 23:41:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2022-07-11 23:41:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-11 23:41:07,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:07,919 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] [2022-07-11 23:41:07,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:41:07,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1607504626, now seen corresponding path program 1 times [2022-07-11 23:41:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636564457] [2022-07-11 23:41:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:07,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:41:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:41:08,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636564457] [2022-07-11 23:41:08,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636564457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:08,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:08,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:41:08,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218394340] [2022-07-11 23:41:08,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:08,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:41:08,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:08,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:41:08,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:41:08,018 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) [2022-07-11 23:41:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:08,118 INFO L93 Difference]: Finished difference Result 236 states and 345 transitions. [2022-07-11 23:41:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:41:08,119 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 [2022-07-11 23:41:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:08,120 INFO L225 Difference]: With dead ends: 236 [2022-07-11 23:41:08,120 INFO L226 Difference]: Without dead ends: 182 [2022-07-11 23:41:08,121 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 [2022-07-11 23:41:08,122 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:08,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 829 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:41:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-11 23:41:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2022-07-11 23:41:08,134 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) [2022-07-11 23:41:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 195 transitions. [2022-07-11 23:41:08,135 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 195 transitions. Word has length 76 [2022-07-11 23:41:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:08,135 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 195 transitions. [2022-07-11 23:41:08,135 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) [2022-07-11 23:41:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 195 transitions. [2022-07-11 23:41:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-11 23:41:08,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:08,137 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] [2022-07-11 23:41:08,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:41:08,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1656623811, now seen corresponding path program 1 times [2022-07-11 23:41:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:08,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538581377] [2022-07-11 23:41:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:41:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-11 23:41:08,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:08,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538581377] [2022-07-11 23:41:08,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538581377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:08,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:41:08,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:41:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230816448] [2022-07-11 23:41:08,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:08,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:08,193 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) [2022-07-11 23:41:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:08,223 INFO L93 Difference]: Finished difference Result 186 states and 274 transitions. [2022-07-11 23:41:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:41:08,224 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 [2022-07-11 23:41:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:08,225 INFO L225 Difference]: With dead ends: 186 [2022-07-11 23:41:08,225 INFO L226 Difference]: Without dead ends: 153 [2022-07-11 23:41:08,226 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 [2022-07-11 23:41:08,226 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 [2022-07-11 23:41:08,227 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] [2022-07-11 23:41:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-11 23:41:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2022-07-11 23:41:08,254 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) [2022-07-11 23:41:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 194 transitions. [2022-07-11 23:41:08,255 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 194 transitions. Word has length 80 [2022-07-11 23:41:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:08,256 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 194 transitions. [2022-07-11 23:41:08,256 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) [2022-07-11 23:41:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 194 transitions. [2022-07-11 23:41:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 23:41:08,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:08,257 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] [2022-07-11 23:41:08,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:41:08,257 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1819933303, now seen corresponding path program 1 times [2022-07-11 23:41:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797820070] [2022-07-11 23:41:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:41:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:41:08,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797820070] [2022-07-11 23:41:08,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797820070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889719072] [2022-07-11 23:41:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:08,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:08,348 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) [2022-07-11 23:41:08,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:41:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:41:08,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:41:08,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889719072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:08,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:08,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-11 23:41:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233352853] [2022-07-11 23:41:08,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:41:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:41:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:41:08,508 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) [2022-07-11 23:41:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:08,614 INFO L93 Difference]: Finished difference Result 270 states and 379 transitions. [2022-07-11 23:41:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:41:08,614 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 [2022-07-11 23:41:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:08,616 INFO L225 Difference]: With dead ends: 270 [2022-07-11 23:41:08,616 INFO L226 Difference]: Without dead ends: 228 [2022-07-11 23:41:08,616 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 [2022-07-11 23:41:08,617 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 [2022-07-11 23:41:08,617 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] [2022-07-11 23:41:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-11 23:41:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 161. [2022-07-11 23:41:08,629 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) [2022-07-11 23:41:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 226 transitions. [2022-07-11 23:41:08,630 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 226 transitions. Word has length 83 [2022-07-11 23:41:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:08,630 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 226 transitions. [2022-07-11 23:41:08,630 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) [2022-07-11 23:41:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 226 transitions. [2022-07-11 23:41:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 23:41:08,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:08,632 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] [2022-07-11 23:41:08,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:08,852 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 [2022-07-11 23:41:08,852 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash 551805959, now seen corresponding path program 1 times [2022-07-11 23:41:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:08,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897632950] [2022-07-11 23:41:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:41:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:41:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:08,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897632950] [2022-07-11 23:41:08,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897632950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108096003] [2022-07-11 23:41:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:08,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:08,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:08,944 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) [2022-07-11 23:41:08,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:41:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:41:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:41:09,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:41:09,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108096003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:09,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:09,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-11 23:41:09,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111821089] [2022-07-11 23:41:09,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:09,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 23:41:09,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:09,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 23:41:09,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:41:09,201 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) [2022-07-11 23:41:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:09,397 INFO L93 Difference]: Finished difference Result 368 states and 513 transitions. [2022-07-11 23:41:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:41:09,397 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 [2022-07-11 23:41:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:09,399 INFO L225 Difference]: With dead ends: 368 [2022-07-11 23:41:09,399 INFO L226 Difference]: Without dead ends: 283 [2022-07-11 23:41:09,400 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 [2022-07-11 23:41:09,400 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 [2022-07-11 23:41:09,401 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] [2022-07-11 23:41:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-11 23:41:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 158. [2022-07-11 23:41:09,411 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) [2022-07-11 23:41:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 217 transitions. [2022-07-11 23:41:09,412 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 217 transitions. Word has length 83 [2022-07-11 23:41:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:09,412 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 217 transitions. [2022-07-11 23:41:09,412 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) [2022-07-11 23:41:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 217 transitions. [2022-07-11 23:41:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-11 23:41:09,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:09,413 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] [2022-07-11 23:41:09,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:09,627 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 [2022-07-11 23:41:09,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash -66223114, now seen corresponding path program 2 times [2022-07-11 23:41:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566753827] [2022-07-11 23:41:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-11 23:41:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:41:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566753827] [2022-07-11 23:41:09,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566753827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416567775] [2022-07-11 23:41:09,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:41:09,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:09,732 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) [2022-07-11 23:41:09,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:41:09,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-11 23:41:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:41:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:41:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:41:09,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:09,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416567775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:09,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:09,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2022-07-11 23:41:09,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506523588] [2022-07-11 23:41:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:09,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:41:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:41:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:41:09,874 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) [2022-07-11 23:41:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:10,089 INFO L93 Difference]: Finished difference Result 312 states and 426 transitions. [2022-07-11 23:41:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:41:10,089 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 [2022-07-11 23:41:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:10,090 INFO L225 Difference]: With dead ends: 312 [2022-07-11 23:41:10,091 INFO L226 Difference]: Without dead ends: 271 [2022-07-11 23:41:10,091 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 [2022-07-11 23:41:10,092 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 [2022-07-11 23:41:10,092 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] [2022-07-11 23:41:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-11 23:41:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 168. [2022-07-11 23:41:10,102 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) [2022-07-11 23:41:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2022-07-11 23:41:10,103 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 87 [2022-07-11 23:41:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:10,103 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2022-07-11 23:41:10,103 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) [2022-07-11 23:41:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2022-07-11 23:41:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-11 23:41:10,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:10,104 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] [2022-07-11 23:41:10,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:10,323 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 [2022-07-11 23:41:10,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash 152631604, now seen corresponding path program 1 times [2022-07-11 23:41:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053933631] [2022-07-11 23:41:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:10,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:10,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 23:41:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:10,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-11 23:41:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:41:10,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053933631] [2022-07-11 23:41:10,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053933631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389017305] [2022-07-11 23:41:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:10,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:10,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:10,439 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) [2022-07-11 23:41:10,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:41:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 23:41:10,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:41:10,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:41:10,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389017305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:10,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:10,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-11 23:41:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483959021] [2022-07-11 23:41:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:41:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:41:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:41:10,658 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) [2022-07-11 23:41:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:13,397 INFO L93 Difference]: Finished difference Result 477 states and 689 transitions. [2022-07-11 23:41:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 23:41:13,398 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 [2022-07-11 23:41:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:13,400 INFO L225 Difference]: With dead ends: 477 [2022-07-11 23:41:13,400 INFO L226 Difference]: Without dead ends: 318 [2022-07-11 23:41:13,401 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 [2022-07-11 23:41:13,402 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 [2022-07-11 23:41:13,402 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] [2022-07-11 23:41:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-11 23:41:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 172. [2022-07-11 23:41:13,419 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) [2022-07-11 23:41:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 229 transitions. [2022-07-11 23:41:13,420 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 229 transitions. Word has length 87 [2022-07-11 23:41:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:13,420 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 229 transitions. [2022-07-11 23:41:13,420 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) [2022-07-11 23:41:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 229 transitions. [2022-07-11 23:41:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-11 23:41:13,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:13,424 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] [2022-07-11 23:41:13,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-11 23:41:13,642 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 [2022-07-11 23:41:13,642 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1886336854, now seen corresponding path program 1 times [2022-07-11 23:41:13,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:13,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594429915] [2022-07-11 23:41:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:13,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:13,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:13,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:41:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:13,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-11 23:41:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:41:13,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594429915] [2022-07-11 23:41:13,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594429915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:13,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34200450] [2022-07-11 23:41:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:13,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:13,740 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) [2022-07-11 23:41:13,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:41:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 23:41:13,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:41:13,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:41:14,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34200450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:14,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-07-11 23:41:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535612723] [2022-07-11 23:41:14,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 23:41:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 23:41:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-07-11 23:41:14,084 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) [2022-07-11 23:41:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:14,743 INFO L93 Difference]: Finished difference Result 625 states and 909 transitions. [2022-07-11 23:41:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-11 23:41:14,744 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 [2022-07-11 23:41:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:14,747 INFO L225 Difference]: With dead ends: 625 [2022-07-11 23:41:14,747 INFO L226 Difference]: Without dead ends: 456 [2022-07-11 23:41:14,748 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 [2022-07-11 23:41:14,749 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 [2022-07-11 23:41:14,749 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] [2022-07-11 23:41:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-11 23:41:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 193. [2022-07-11 23:41:14,768 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) [2022-07-11 23:41:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 260 transitions. [2022-07-11 23:41:14,770 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 260 transitions. Word has length 89 [2022-07-11 23:41:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:14,770 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 260 transitions. [2022-07-11 23:41:14,771 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) [2022-07-11 23:41:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 260 transitions. [2022-07-11 23:41:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-11 23:41:14,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:14,772 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] [2022-07-11 23:41:14,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:14,998 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 [2022-07-11 23:41:14,998 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1033497780, now seen corresponding path program 2 times [2022-07-11 23:41:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:14,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500806737] [2022-07-11 23:41:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:14,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:15,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:15,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 23:41:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-11 23:41:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:41:15,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:15,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500806737] [2022-07-11 23:41:15,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500806737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:15,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619850209] [2022-07-11 23:41:15,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:41:15,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:15,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:15,175 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) [2022-07-11 23:41:15,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:41:15,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:41:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:41:15,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 23:41:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-11 23:41:15,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-11 23:41:15,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619850209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:15,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:15,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-07-11 23:41:15,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015680766] [2022-07-11 23:41:15,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:15,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 23:41:15,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 23:41:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-07-11 23:41:15,861 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) [2022-07-11 23:41:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:17,769 INFO L93 Difference]: Finished difference Result 496 states and 711 transitions. [2022-07-11 23:41:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-11 23:41:17,769 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 [2022-07-11 23:41:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:17,771 INFO L225 Difference]: With dead ends: 496 [2022-07-11 23:41:17,771 INFO L226 Difference]: Without dead ends: 304 [2022-07-11 23:41:17,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=4390, Unknown=0, NotChecked=0, Total=5256 [2022-07-11 23:41:17,774 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 [2022-07-11 23:41:17,774 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] [2022-07-11 23:41:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-11 23:41:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 193. [2022-07-11 23:41:17,790 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) [2022-07-11 23:41:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2022-07-11 23:41:17,792 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 99 [2022-07-11 23:41:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:17,792 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2022-07-11 23:41:17,792 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) [2022-07-11 23:41:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2022-07-11 23:41:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-11 23:41:17,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:17,794 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] [2022-07-11 23:41:17,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:18,000 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 [2022-07-11 23:41:18,000 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1305340779, now seen corresponding path program 1 times [2022-07-11 23:41:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379471474] [2022-07-11 23:41:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:18,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 23:41:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-11 23:41:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-11 23:41:18,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379471474] [2022-07-11 23:41:18,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379471474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226756209] [2022-07-11 23:41:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:18,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:18,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:18,061 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) [2022-07-11 23:41:18,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:41:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:41:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-11 23:41:18,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:18,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226756209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:18,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:18,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-11 23:41:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431556730] [2022-07-11 23:41:18,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:18,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:41:18,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:18,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:41:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:41:18,144 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) [2022-07-11 23:41:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:18,190 INFO L93 Difference]: Finished difference Result 396 states and 544 transitions. [2022-07-11 23:41:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:41:18,191 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 [2022-07-11 23:41:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:18,193 INFO L225 Difference]: With dead ends: 396 [2022-07-11 23:41:18,193 INFO L226 Difference]: Without dead ends: 212 [2022-07-11 23:41:18,193 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 [2022-07-11 23:41:18,194 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 [2022-07-11 23:41:18,194 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] [2022-07-11 23:41:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-11 23:41:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2022-07-11 23:41:18,208 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) [2022-07-11 23:41:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 261 transitions. [2022-07-11 23:41:18,210 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 261 transitions. Word has length 104 [2022-07-11 23:41:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:18,211 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 261 transitions. [2022-07-11 23:41:18,211 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) [2022-07-11 23:41:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 261 transitions. [2022-07-11 23:41:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:41:18,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:18,213 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] [2022-07-11 23:41:18,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-11 23:41:18,435 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 [2022-07-11 23:41:18,435 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1414826554, now seen corresponding path program 1 times [2022-07-11 23:41:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215269338] [2022-07-11 23:41:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 23:41:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-11 23:41:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:18,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215269338] [2022-07-11 23:41:18,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215269338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770089150] [2022-07-11 23:41:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:18,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:18,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:18,592 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) [2022-07-11 23:41:18,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:41:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:18,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:41:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:18,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:18,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770089150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:18,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:18,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-11 23:41:18,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881674505] [2022-07-11 23:41:18,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:18,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:41:18,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:41:18,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:41:18,821 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) [2022-07-11 23:41:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:19,079 INFO L93 Difference]: Finished difference Result 526 states and 723 transitions. [2022-07-11 23:41:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:41:19,080 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 [2022-07-11 23:41:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:19,082 INFO L225 Difference]: With dead ends: 526 [2022-07-11 23:41:19,082 INFO L226 Difference]: Without dead ends: 493 [2022-07-11 23:41:19,083 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 [2022-07-11 23:41:19,083 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 [2022-07-11 23:41:19,084 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] [2022-07-11 23:41:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-07-11 23:41:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 241. [2022-07-11 23:41:19,103 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) [2022-07-11 23:41:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2022-07-11 23:41:19,104 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 105 [2022-07-11 23:41:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:19,105 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2022-07-11 23:41:19,105 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) [2022-07-11 23:41:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2022-07-11 23:41:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:41:19,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:19,107 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] [2022-07-11 23:41:19,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:19,325 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 [2022-07-11 23:41:19,325 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash -579318152, now seen corresponding path program 1 times [2022-07-11 23:41:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:19,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297966473] [2022-07-11 23:41:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:19,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:19,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:19,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 23:41:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:19,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-11 23:41:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:19,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297966473] [2022-07-11 23:41:19,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297966473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124466952] [2022-07-11 23:41:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:19,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:19,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:19,430 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) [2022-07-11 23:41:19,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:41:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:19,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:41:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-11 23:41:19,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-11 23:41:19,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124466952] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:19,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:19,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-11 23:41:19,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386389733] [2022-07-11 23:41:19,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:19,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 23:41:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 23:41:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:41:19,844 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) [2022-07-11 23:41:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:20,704 INFO L93 Difference]: Finished difference Result 634 states and 892 transitions. [2022-07-11 23:41:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-11 23:41:20,704 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 [2022-07-11 23:41:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:20,707 INFO L225 Difference]: With dead ends: 634 [2022-07-11 23:41:20,707 INFO L226 Difference]: Without dead ends: 555 [2022-07-11 23:41:20,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2022-07-11 23:41:20,710 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:20,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 1375 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:41:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-11 23:41:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 244. [2022-07-11 23:41:20,753 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) [2022-07-11 23:41:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 332 transitions. [2022-07-11 23:41:20,756 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 332 transitions. Word has length 105 [2022-07-11 23:41:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:20,756 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 332 transitions. [2022-07-11 23:41:20,757 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) [2022-07-11 23:41:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 332 transitions. [2022-07-11 23:41:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:41:20,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:20,759 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] [2022-07-11 23:41:20,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:20,971 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 [2022-07-11 23:41:20,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1689586168, now seen corresponding path program 1 times [2022-07-11 23:41:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307821670] [2022-07-11 23:41:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:20,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 23:41:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-11 23:41:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307821670] [2022-07-11 23:41:21,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307821670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092315476] [2022-07-11 23:41:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:21,071 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) [2022-07-11 23:41:21,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 23:41:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:41:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:21,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092315476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:21,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-07-11 23:41:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764774279] [2022-07-11 23:41:21,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:21,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:41:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:41:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:41:21,267 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) [2022-07-11 23:41:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:21,461 INFO L93 Difference]: Finished difference Result 378 states and 525 transitions. [2022-07-11 23:41:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:41:21,461 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 [2022-07-11 23:41:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:21,465 INFO L225 Difference]: With dead ends: 378 [2022-07-11 23:41:21,465 INFO L226 Difference]: Without dead ends: 303 [2022-07-11 23:41:21,466 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 [2022-07-11 23:41:21,467 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 [2022-07-11 23:41:21,467 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] [2022-07-11 23:41:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-11 23:41:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 230. [2022-07-11 23:41:21,488 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) [2022-07-11 23:41:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 309 transitions. [2022-07-11 23:41:21,490 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 309 transitions. Word has length 105 [2022-07-11 23:41:21,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:21,490 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 309 transitions. [2022-07-11 23:41:21,490 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) [2022-07-11 23:41:21,491 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 309 transitions. [2022-07-11 23:41:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-11 23:41:21,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:21,492 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] [2022-07-11 23:41:21,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:21,716 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 [2022-07-11 23:41:21,716 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1197064006, now seen corresponding path program 1 times [2022-07-11 23:41:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:21,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502031225] [2022-07-11 23:41:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 23:41:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 23:41:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-11 23:41:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:21,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502031225] [2022-07-11 23:41:21,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502031225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:21,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349993895] [2022-07-11 23:41:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:21,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:21,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:21,785 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) [2022-07-11 23:41:21,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 23:41:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:41:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-11 23:41:21,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:41:21,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349993895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:41:21,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:41:21,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-11 23:41:21,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10212659] [2022-07-11 23:41:21,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:41:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:41:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:41:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:41:21,884 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) [2022-07-11 23:41:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:21,954 INFO L93 Difference]: Finished difference Result 476 states and 654 transitions. [2022-07-11 23:41:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:41:21,955 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 [2022-07-11 23:41:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:21,956 INFO L225 Difference]: With dead ends: 476 [2022-07-11 23:41:21,956 INFO L226 Difference]: Without dead ends: 255 [2022-07-11 23:41:21,957 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 [2022-07-11 23:41:21,959 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 [2022-07-11 23:41:21,959 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] [2022-07-11 23:41:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-11 23:41:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 235. [2022-07-11 23:41:21,980 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) [2022-07-11 23:41:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 317 transitions. [2022-07-11 23:41:21,981 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 317 transitions. Word has length 106 [2022-07-11 23:41:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:21,982 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 317 transitions. [2022-07-11 23:41:21,982 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) [2022-07-11 23:41:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 317 transitions. [2022-07-11 23:41:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-11 23:41:21,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:41:21,984 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] [2022-07-11 23:41:22,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-11 23:41:22,201 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 [2022-07-11 23:41:22,201 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:41:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:41:22,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1599024705, now seen corresponding path program 1 times [2022-07-11 23:41:22,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:41:22,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626819707] [2022-07-11 23:41:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:22,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:41:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:22,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:41:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:22,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:41:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:22,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 23:41:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:22,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-11 23:41:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:41:22,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:41:22,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626819707] [2022-07-11 23:41:22,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626819707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:41:22,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626960604] [2022-07-11 23:41:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:41:22,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:41:22,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:41:22,405 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) [2022-07-11 23:41:22,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 23:41:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:41:22,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-11 23:41:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:41:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-11 23:41:22,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:41:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-11 23:41:24,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626960604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:41:24,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:41:24,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 27 [2022-07-11 23:41:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902009925] [2022-07-11 23:41:24,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:41:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-11 23:41:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:41:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-11 23:41:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-07-11 23:41:24,249 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) [2022-07-11 23:41:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:41:26,251 INFO L93 Difference]: Finished difference Result 547 states and 789 transitions. [2022-07-11 23:41:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-11 23:41:26,251 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 [2022-07-11 23:41:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:41:26,252 INFO L225 Difference]: With dead ends: 547 [2022-07-11 23:41:26,252 INFO L226 Difference]: Without dead ends: 0 [2022-07-11 23:41:26,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=846, Invalid=4266, Unknown=0, NotChecked=0, Total=5112 [2022-07-11 23:41:26,256 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:41:26,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 426 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:41:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-11 23:41:26,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-11 23:41:26,257 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) [2022-07-11 23:41:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-11 23:41:26,257 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2022-07-11 23:41:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:41:26,257 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-11 23:41:26,257 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) [2022-07-11 23:41:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-11 23:41:26,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-11 23:41:26,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-11 23:41:26,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 23:41:26,460 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 [2022-07-11 23:41:26,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-11 23:41:48,719 WARN L233 SmtUtils]: Spent 18.94s 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)