./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/Problem05_label46+token_ring.02.cil-1.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 ff26d52d3dd6862aaa491849b175f59b72df2f5a860b195ac82ad5bea041e83f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:00:17,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:00:17,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:00:17,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:00:17,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:00:17,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:00:17,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:00:17,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:00:17,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:00:17,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:00:17,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:00:17,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:00:17,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:00:17,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:00:17,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:00:17,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:00:17,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:00:17,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:00:17,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:00:17,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:00:17,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:00:17,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:00:17,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:00:17,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:00:17,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:00:17,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:00:17,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:00:17,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:00:17,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:00:17,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:00:17,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:00:17,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:00:17,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:00:17,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:00:17,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:00:17,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:00:17,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:00:17,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:00:17,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:00:17,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:00:17,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:00:17,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:00:17,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:00:17,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:00:17,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:00:17,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:00:17,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:00:17,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:00:17,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:00:17,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:00:17,158 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:00:17,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:00:17,159 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:00:17,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:00:17,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:00:17,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:00:17,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:00:17,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:00:17,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:00:17,161 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:00:17,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:00:17,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:00:17,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:00:17,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:00:17,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:00:17,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:00:17,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:00:17,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:00:17,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:00:17,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:00:17,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:00:17,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:00:17,164 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:00:17,164 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:00:17,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:00:17,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:00:17,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff26d52d3dd6862aaa491849b175f59b72df2f5a860b195ac82ad5bea041e83f [2021-12-17 19:00:17,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:00:17,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:00:17,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:00:17,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:00:17,439 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:00:17,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c [2021-12-17 19:00:17,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9f703665/d428284d89954263b2082e04af51933b/FLAGb2ce77aba [2021-12-17 19:00:18,355 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:00:18,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c [2021-12-17 19:00:18,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9f703665/d428284d89954263b2082e04af51933b/FLAGb2ce77aba [2021-12-17 19:00:18,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9f703665/d428284d89954263b2082e04af51933b [2021-12-17 19:00:18,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:00:18,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:00:18,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:00:18,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:00:18,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:00:18,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:00:18" (1/1) ... [2021-12-17 19:00:18,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f96f955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:18, skipping insertion in model container [2021-12-17 19:00:18,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:00:18" (1/1) ... [2021-12-17 19:00:18,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:00:18,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:00:20,369 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/combinations/Problem05_label46+token_ring.02.cil-1.c[382357,382370] [2021-12-17 19:00:20,390 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/combinations/Problem05_label46+token_ring.02.cil-1.c[383339,383352] [2021-12-17 19:00:20,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:00:20,531 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:00:21,393 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/combinations/Problem05_label46+token_ring.02.cil-1.c[382357,382370] [2021-12-17 19:00:21,397 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/combinations/Problem05_label46+token_ring.02.cil-1.c[383339,383352] [2021-12-17 19:00:21,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:00:21,462 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:00:21,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21 WrapperNode [2021-12-17 19:00:21,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:00:21,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:00:21,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:00:21,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:00:21,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:21,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:21,880 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-17 19:00:21,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:00:21,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:00:21,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:00:21,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:00:21,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:21,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:21,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:21,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:22,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:22,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:22,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:22,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:00:22,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:00:22,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:00:22,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:00:22,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (1/1) ... [2021-12-17 19:00:22,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:00:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:22,316 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) [2021-12-17 19:00:22,333 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 [2021-12-17 19:00:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:00:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 19:00:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 19:00:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 19:00:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 19:00:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 19:00:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 19:00:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 19:00:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 19:00:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 19:00:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 19:00:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:00:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 19:00:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 19:00:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:00:22,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:00:22,460 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:00:22,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:00:27,196 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:00:27,223 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:00:27,224 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-17 19:00:27,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:00:27 BoogieIcfgContainer [2021-12-17 19:00:27,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:00:27,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:00:27,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:00:27,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:00:27,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:00:18" (1/3) ... [2021-12-17 19:00:27,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f7ff7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:00:27, skipping insertion in model container [2021-12-17 19:00:27,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:21" (2/3) ... [2021-12-17 19:00:27,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f7ff7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:00:27, skipping insertion in model container [2021-12-17 19:00:27,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:00:27" (3/3) ... [2021-12-17 19:00:27,239 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.02.cil-1.c [2021-12-17 19:00:27,243 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:00:27,244 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:00:27,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:00:27,290 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 19:00:27,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:00:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 19:00:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 19:00:27,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:27,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:27,349 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-17 19:00:27,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:27,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237573791] [2021-12-17 19:00:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:27,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:27,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:27,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:27,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:27,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237573791] [2021-12-17 19:00:27,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237573791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:27,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:27,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:00:27,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184215644] [2021-12-17 19:00:27,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:27,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:00:27,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:00:27,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:00:27,714 INFO L87 Difference]: Start difference. First operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:28,436 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-17 19:00:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:00:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-17 19:00:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:28,454 INFO L225 Difference]: With dead ends: 4802 [2021-12-17 19:00:28,471 INFO L226 Difference]: Without dead ends: 2427 [2021-12-17 19:00:28,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:00:28,480 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12460 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 16708 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:28,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:00:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-17 19:00:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-17 19:00:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8333333333333333) internal successors, (4257), 2325 states have internal predecessors, (4257), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-17 19:00:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-17 19:00:28,631 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-17 19:00:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:28,631 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-17 19:00:28,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-17 19:00:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 19:00:28,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:28,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:28,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 19:00:28,636 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-17 19:00:28,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:28,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598002463] [2021-12-17 19:00:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:28,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:28,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:28,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:28,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:28,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598002463] [2021-12-17 19:00:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598002463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:28,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:28,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:28,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718631882] [2021-12-17 19:00:28,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:28,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:28,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:28,790 INFO L87 Difference]: Start difference. First operand 2364 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:29,780 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-17 19:00:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:00:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-17 19:00:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:29,793 INFO L225 Difference]: With dead ends: 2807 [2021-12-17 19:00:29,794 INFO L226 Difference]: Without dead ends: 2574 [2021-12-17 19:00:29,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:00:29,800 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16464 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20710 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:29,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20710 Invalid, 877 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 19:00:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-17 19:00:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-17 19:00:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2413 states have (on average 1.8188976377952757) internal successors, (4389), 2417 states have internal predecessors, (4389), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-17 19:00:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-17 19:00:29,866 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-17 19:00:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:29,867 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-17 19:00:29,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-17 19:00:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 19:00:29,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:29,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:29,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 19:00:29,872 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-17 19:00:29,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:29,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810057291] [2021-12-17 19:00:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:29,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:29,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:29,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:29,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:30,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:30,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810057291] [2021-12-17 19:00:30,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810057291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:30,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:30,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:30,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040925015] [2021-12-17 19:00:30,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:30,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:30,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:30,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:30,010 INFO L87 Difference]: Start difference. First operand 2473 states and 4470 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:30,656 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-17 19:00:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:00:30,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-17 19:00:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:30,668 INFO L225 Difference]: With dead ends: 3193 [2021-12-17 19:00:30,668 INFO L226 Difference]: Without dead ends: 2851 [2021-12-17 19:00:30,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:00:30,671 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16279 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 20448 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:30,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 20448 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 19:00:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-17 19:00:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-17 19:00:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2596 states have (on average 1.7927580893682589) internal successors, (4654), 2602 states have internal predecessors, (4654), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-17 19:00:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-17 19:00:30,730 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-17 19:00:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:30,730 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-17 19:00:30,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-17 19:00:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 19:00:30,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:30,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:30,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 19:00:30,732 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-17 19:00:30,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:30,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066674909] [2021-12-17 19:00:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:30,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:30,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:30,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066674909] [2021-12-17 19:00:30,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066674909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:30,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:30,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:30,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188628021] [2021-12-17 19:00:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:30,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:30,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:30,793 INFO L87 Difference]: Start difference. First operand 2692 states and 4787 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:31,605 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-17 19:00:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:00:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-17 19:00:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:31,620 INFO L225 Difference]: With dead ends: 4037 [2021-12-17 19:00:31,620 INFO L226 Difference]: Without dead ends: 3476 [2021-12-17 19:00:31,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:00:31,623 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 20704 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:31,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20704 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 19:00:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-17 19:00:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-17 19:00:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.7530612244897958) internal successors, (5154), 2950 states have internal predecessors, (5154), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-17 19:00:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-17 19:00:31,778 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-17 19:00:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:31,778 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-17 19:00:31,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-17 19:00:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 19:00:31,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:31,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:31,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 19:00:31,785 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:31,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-17 19:00:31,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972087377] [2021-12-17 19:00:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:31,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:31,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:31,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:31,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:31,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972087377] [2021-12-17 19:00:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972087377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:31,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:31,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:31,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616564673] [2021-12-17 19:00:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:31,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:31,892 INFO L87 Difference]: Start difference. First operand 3104 states and 5389 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:32,225 INFO L93 Difference]: Finished difference Result 4308 states and 7182 transitions. [2021-12-17 19:00:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:00:32,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-17 19:00:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:32,235 INFO L225 Difference]: With dead ends: 4308 [2021-12-17 19:00:32,235 INFO L226 Difference]: Without dead ends: 3335 [2021-12-17 19:00:32,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:00:32,240 INFO L933 BasicCegarLoop]: 4118 mSDtfsCounter, 4257 mSDsluCounter, 16125 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4267 SdHoareTripleChecker+Valid, 20243 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:32,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4267 Valid, 20243 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 19:00:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-17 19:00:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3104. [2021-12-17 19:00:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.75) internal successors, (5145), 2950 states have internal predecessors, (5145), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-17 19:00:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5380 transitions. [2021-12-17 19:00:32,311 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5380 transitions. Word has length 68 [2021-12-17 19:00:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:32,312 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5380 transitions. [2021-12-17 19:00:32,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5380 transitions. [2021-12-17 19:00:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 19:00:32,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:32,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:32,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 19:00:32,314 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:32,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-17 19:00:32,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:32,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291488673] [2021-12-17 19:00:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:32,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:32,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:32,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:32,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:32,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:32,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291488673] [2021-12-17 19:00:32,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291488673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:32,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:32,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:00:32,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762397264] [2021-12-17 19:00:32,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:32,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:00:32,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:00:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:00:32,386 INFO L87 Difference]: Start difference. First operand 3104 states and 5380 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:32,948 INFO L93 Difference]: Finished difference Result 4949 states and 8091 transitions. [2021-12-17 19:00:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:00:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-17 19:00:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:32,960 INFO L225 Difference]: With dead ends: 4949 [2021-12-17 19:00:32,960 INFO L226 Difference]: Without dead ends: 3977 [2021-12-17 19:00:32,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 19:00:32,963 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 4481 mSDsluCounter, 12257 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4506 SdHoareTripleChecker+Valid, 16555 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:32,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4506 Valid, 16555 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 19:00:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2021-12-17 19:00:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3634. [2021-12-17 19:00:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3380 states have (on average 1.7044378698224851) internal successors, (5761), 3399 states have internal predecessors, (5761), 156 states have call successors, (156), 84 states have call predecessors, (156), 96 states have return successors, (201), 158 states have call predecessors, (201), 156 states have call successors, (201) [2021-12-17 19:00:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 6118 transitions. [2021-12-17 19:00:33,061 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 6118 transitions. Word has length 68 [2021-12-17 19:00:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:33,061 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 6118 transitions. [2021-12-17 19:00:33,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:00:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 6118 transitions. [2021-12-17 19:00:33,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 19:00:33,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:33,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:33,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 19:00:33,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:33,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:33,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-17 19:00:33,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:33,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349790802] [2021-12-17 19:00:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:33,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 19:00:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 19:00:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:00:33,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349790802] [2021-12-17 19:00:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349790802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182771662] [2021-12-17 19:00:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:33,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:33,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:33,159 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) [2021-12-17 19:00:33,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 19:00:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:00:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 19:00:33,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:33,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182771662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:33,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:33,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:00:33,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391389735] [2021-12-17 19:00:33,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:33,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:33,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:33,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:33,420 INFO L87 Difference]: Start difference. First operand 3634 states and 6118 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:00:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:33,548 INFO L93 Difference]: Finished difference Result 6567 states and 10352 transitions. [2021-12-17 19:00:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:33,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-12-17 19:00:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:33,561 INFO L225 Difference]: With dead ends: 6567 [2021-12-17 19:00:33,561 INFO L226 Difference]: Without dead ends: 5065 [2021-12-17 19:00:33,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:33,564 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4097 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4307 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:33,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4307 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2021-12-17 19:00:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 5035. [2021-12-17 19:00:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 4547 states have (on average 1.633164723993842) internal successors, (7426), 4583 states have internal predecessors, (7426), 294 states have call successors, (294), 168 states have call predecessors, (294), 192 states have return successors, (377), 291 states have call predecessors, (377), 294 states have call successors, (377) [2021-12-17 19:00:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 8097 transitions. [2021-12-17 19:00:33,669 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 8097 transitions. Word has length 110 [2021-12-17 19:00:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:33,669 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 8097 transitions. [2021-12-17 19:00:33,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:00:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 8097 transitions. [2021-12-17 19:00:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 19:00:33,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:33,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:33,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 19:00:33,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:33,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-17 19:00:33,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:33,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522807891] [2021-12-17 19:00:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:33,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 19:00:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 19:00:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:00:34,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:34,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522807891] [2021-12-17 19:00:34,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522807891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:34,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247392025] [2021-12-17 19:00:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:34,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:34,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:34,028 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) [2021-12-17 19:00:34,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 19:00:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:00:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 19:00:34,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:34,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247392025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:34,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:34,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:34,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731721957] [2021-12-17 19:00:34,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:34,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:34,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:34,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:34,245 INFO L87 Difference]: Start difference. First operand 5035 states and 8097 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 19:00:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:34,371 INFO L93 Difference]: Finished difference Result 10695 states and 16311 transitions. [2021-12-17 19:00:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2021-12-17 19:00:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:34,396 INFO L225 Difference]: With dead ends: 10695 [2021-12-17 19:00:34,397 INFO L226 Difference]: Without dead ends: 7793 [2021-12-17 19:00:34,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:34,406 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 153 mSDsluCounter, 4137 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 8435 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:34,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 8435 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2021-12-17 19:00:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 7793. [2021-12-17 19:00:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7793 states, 6840 states have (on average 1.557748538011696) internal successors, (10655), 6901 states have internal predecessors, (10655), 567 states have call successors, (567), 336 states have call predecessors, (567), 384 states have return successors, (836), 571 states have call predecessors, (836), 567 states have call successors, (836) [2021-12-17 19:00:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7793 states to 7793 states and 12058 transitions. [2021-12-17 19:00:34,594 INFO L78 Accepts]: Start accepts. Automaton has 7793 states and 12058 transitions. Word has length 110 [2021-12-17 19:00:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:34,594 INFO L470 AbstractCegarLoop]: Abstraction has 7793 states and 12058 transitions. [2021-12-17 19:00:34,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 19:00:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7793 states and 12058 transitions. [2021-12-17 19:00:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 19:00:34,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:34,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:34,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 19:00:34,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 19:00:34,823 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-17 19:00:34,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217788646] [2021-12-17 19:00:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:34,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 19:00:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 19:00:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 19:00:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 19:00:34,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:34,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217788646] [2021-12-17 19:00:34,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217788646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:34,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790511938] [2021-12-17 19:00:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:34,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:34,952 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) [2021-12-17 19:00:34,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 19:00:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:35,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:00:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 19:00:35,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:35,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790511938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:35,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:35,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:00:35,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146786096] [2021-12-17 19:00:35,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:35,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:35,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:35,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:35,275 INFO L87 Difference]: Start difference. First operand 7793 states and 12058 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 19:00:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:35,567 INFO L93 Difference]: Finished difference Result 18769 states and 27911 transitions. [2021-12-17 19:00:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:35,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-17 19:00:35,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:35,609 INFO L225 Difference]: With dead ends: 18769 [2021-12-17 19:00:35,609 INFO L226 Difference]: Without dead ends: 13113 [2021-12-17 19:00:35,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:35,642 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4055 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4055 SdHoareTripleChecker+Valid, 4316 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:35,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4055 Valid, 4316 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2021-12-17 19:00:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 12999. [2021-12-17 19:00:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 11194 states have (on average 1.5019653385742362) internal successors, (16813), 11313 states have internal predecessors, (16813), 1053 states have call successors, (1053), 654 states have call predecessors, (1053), 750 states have return successors, (1534), 1047 states have call predecessors, (1534), 1053 states have call successors, (1534) [2021-12-17 19:00:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19400 transitions. [2021-12-17 19:00:36,054 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19400 transitions. Word has length 142 [2021-12-17 19:00:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:36,055 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 19400 transitions. [2021-12-17 19:00:36,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 19:00:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19400 transitions. [2021-12-17 19:00:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 19:00:36,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:36,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:36,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 19:00:36,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:36,295 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-17 19:00:36,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:36,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743387583] [2021-12-17 19:00:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:36,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 19:00:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 19:00:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 19:00:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 19:00:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 19:00:36,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743387583] [2021-12-17 19:00:36,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743387583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513333511] [2021-12-17 19:00:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:36,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:36,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:36,388 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) [2021-12-17 19:00:36,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 19:00:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:36,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:00:36,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 19:00:36,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:36,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513333511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:36,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:36,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:36,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464802869] [2021-12-17 19:00:36,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:36,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:36,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:36,706 INFO L87 Difference]: Start difference. First operand 12999 states and 19400 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:00:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:36,995 INFO L93 Difference]: Finished difference Result 25185 states and 37088 transitions. [2021-12-17 19:00:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-17 19:00:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:37,037 INFO L225 Difference]: With dead ends: 25185 [2021-12-17 19:00:37,037 INFO L226 Difference]: Without dead ends: 14321 [2021-12-17 19:00:37,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:37,069 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4074 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:37,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4074 Valid, 4170 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14321 states. [2021-12-17 19:00:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14321 to 14321. [2021-12-17 19:00:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 12384 states have (on average 1.448562661498708) internal successors, (17939), 12503 states have internal predecessors, (17939), 1091 states have call successors, (1091), 748 states have call predecessors, (1091), 844 states have return successors, (1586), 1085 states have call predecessors, (1586), 1091 states have call successors, (1586) [2021-12-17 19:00:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 20616 transitions. [2021-12-17 19:00:37,603 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 20616 transitions. Word has length 159 [2021-12-17 19:00:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:37,603 INFO L470 AbstractCegarLoop]: Abstraction has 14321 states and 20616 transitions. [2021-12-17 19:00:37,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:00:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 20616 transitions. [2021-12-17 19:00:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 19:00:37,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:37,626 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:37,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 19:00:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:37,843 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-17 19:00:37,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093949] [2021-12-17 19:00:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:37,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 19:00:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 19:00:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 19:00:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 19:00:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 19:00:37,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093949] [2021-12-17 19:00:37,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766957458] [2021-12-17 19:00:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:37,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:37,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:37,956 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) [2021-12-17 19:00:37,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 19:00:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:38,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:00:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 19:00:38,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:38,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766957458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:38,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:38,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:38,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336244616] [2021-12-17 19:00:38,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:38,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:38,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:38,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:38,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:38,261 INFO L87 Difference]: Start difference. First operand 14321 states and 20616 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 19:00:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:38,628 INFO L93 Difference]: Finished difference Result 23600 states and 33252 transitions. [2021-12-17 19:00:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-17 19:00:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:38,670 INFO L225 Difference]: With dead ends: 23600 [2021-12-17 19:00:38,670 INFO L226 Difference]: Without dead ends: 15189 [2021-12-17 19:00:38,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:38,693 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4087 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4323 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:38,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4323 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15189 states. [2021-12-17 19:00:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15189 to 15129. [2021-12-17 19:00:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15129 states, 13112 states have (on average 1.423352654057352) internal successors, (18663), 13231 states have internal predecessors, (18663), 1111 states have call successors, (1111), 808 states have call predecessors, (1111), 904 states have return successors, (1666), 1105 states have call predecessors, (1666), 1111 states have call successors, (1666) [2021-12-17 19:00:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15129 states to 15129 states and 21440 transitions. [2021-12-17 19:00:39,230 INFO L78 Accepts]: Start accepts. Automaton has 15129 states and 21440 transitions. Word has length 159 [2021-12-17 19:00:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:39,230 INFO L470 AbstractCegarLoop]: Abstraction has 15129 states and 21440 transitions. [2021-12-17 19:00:39,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 19:00:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 15129 states and 21440 transitions. [2021-12-17 19:00:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 19:00:39,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:39,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:39,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 19:00:39,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 19:00:39,479 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:39,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:39,479 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-17 19:00:39,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:39,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134710738] [2021-12-17 19:00:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:39,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 19:00:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 19:00:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 19:00:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 19:00:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 19:00:39,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:39,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134710738] [2021-12-17 19:00:39,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134710738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:39,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100665744] [2021-12-17 19:00:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:39,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:39,575 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) [2021-12-17 19:00:39,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 19:00:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:39,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:00:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 19:00:39,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:39,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100665744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:39,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:39,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:39,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492150484] [2021-12-17 19:00:39,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:39,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:39,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:39,863 INFO L87 Difference]: Start difference. First operand 15129 states and 21440 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 19:00:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:40,513 INFO L93 Difference]: Finished difference Result 39445 states and 54854 transitions. [2021-12-17 19:00:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:40,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-17 19:00:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:40,639 INFO L225 Difference]: With dead ends: 39445 [2021-12-17 19:00:40,639 INFO L226 Difference]: Without dead ends: 26455 [2021-12-17 19:00:40,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:40,667 INFO L933 BasicCegarLoop]: 4171 mSDtfsCounter, 4101 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4101 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:40,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4101 Valid, 4332 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26455 states. [2021-12-17 19:00:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26455 to 26061. [2021-12-17 19:00:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26061 states, 22254 states have (on average 1.3790329828345467) internal successors, (30689), 22491 states have internal predecessors, (30689), 2109 states have call successors, (2109), 1504 states have call predecessors, (2109), 1696 states have return successors, (3834), 2097 states have call predecessors, (3834), 2109 states have call successors, (3834) [2021-12-17 19:00:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26061 states to 26061 states and 36632 transitions. [2021-12-17 19:00:41,409 INFO L78 Accepts]: Start accepts. Automaton has 26061 states and 36632 transitions. Word has length 160 [2021-12-17 19:00:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:41,409 INFO L470 AbstractCegarLoop]: Abstraction has 26061 states and 36632 transitions. [2021-12-17 19:00:41,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 19:00:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 26061 states and 36632 transitions. [2021-12-17 19:00:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 19:00:41,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:41,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:41,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 19:00:41,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:41,660 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:41,660 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-17 19:00:41,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:41,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139919033] [2021-12-17 19:00:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:41,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 19:00:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 19:00:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 19:00:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 19:00:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 19:00:41,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139919033] [2021-12-17 19:00:41,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139919033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:41,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025051934] [2021-12-17 19:00:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:41,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:41,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:41,763 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) [2021-12-17 19:00:41,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 19:00:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:00:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 19:00:42,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025051934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:42,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:42,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:42,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547969112] [2021-12-17 19:00:42,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:42,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:42,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:42,086 INFO L87 Difference]: Start difference. First operand 26061 states and 36632 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:00:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:42,783 INFO L93 Difference]: Finished difference Result 52503 states and 73687 transitions. [2021-12-17 19:00:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-17 19:00:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:42,862 INFO L225 Difference]: With dead ends: 52503 [2021-12-17 19:00:42,862 INFO L226 Difference]: Without dead ends: 28589 [2021-12-17 19:00:42,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:42,904 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4089 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 4169 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:42,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 4169 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28589 states. [2021-12-17 19:00:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28589 to 28509. [2021-12-17 19:00:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28509 states, 24590 states have (on average 1.3440016266775112) internal successors, (33049), 24827 states have internal predecessors, (33049), 2109 states have call successors, (2109), 1616 states have call predecessors, (2109), 1808 states have return successors, (3774), 2097 states have call predecessors, (3774), 2109 states have call successors, (3774) [2021-12-17 19:00:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28509 states to 28509 states and 38932 transitions. [2021-12-17 19:00:43,706 INFO L78 Accepts]: Start accepts. Automaton has 28509 states and 38932 transitions. Word has length 160 [2021-12-17 19:00:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:43,706 INFO L470 AbstractCegarLoop]: Abstraction has 28509 states and 38932 transitions. [2021-12-17 19:00:43,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:00:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 28509 states and 38932 transitions. [2021-12-17 19:00:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 19:00:43,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:43,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:43,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 19:00:43,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:43,964 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-17 19:00:43,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:43,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072499892] [2021-12-17 19:00:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:43,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:43,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 19:00:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 19:00:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 19:00:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 19:00:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 19:00:44,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:44,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072499892] [2021-12-17 19:00:44,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072499892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:44,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512916530] [2021-12-17 19:00:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:44,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:44,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:44,045 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) [2021-12-17 19:00:44,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 19:00:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:00:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 19:00:44,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:44,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512916530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:44,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:44,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:44,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913655688] [2021-12-17 19:00:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:44,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:44,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:44,345 INFO L87 Difference]: Start difference. First operand 28509 states and 38932 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 19:00:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:45,463 INFO L93 Difference]: Finished difference Result 78523 states and 106744 transitions. [2021-12-17 19:00:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-17 19:00:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:45,625 INFO L225 Difference]: With dead ends: 78523 [2021-12-17 19:00:45,625 INFO L226 Difference]: Without dead ends: 52161 [2021-12-17 19:00:45,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:45,689 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4098 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:45,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4341 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52161 states. [2021-12-17 19:00:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52161 to 50647. [2021-12-17 19:00:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50647 states, 43260 states have (on average 1.3100554785020804) internal successors, (56673), 43733 states have internal predecessors, (56673), 3993 states have call successors, (3993), 3008 states have call predecessors, (3993), 3392 states have return successors, (8324), 3969 states have call predecessors, (8324), 3993 states have call successors, (8324) [2021-12-17 19:00:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50647 states to 50647 states and 68990 transitions. [2021-12-17 19:00:47,918 INFO L78 Accepts]: Start accepts. Automaton has 50647 states and 68990 transitions. Word has length 160 [2021-12-17 19:00:47,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:47,920 INFO L470 AbstractCegarLoop]: Abstraction has 50647 states and 68990 transitions. [2021-12-17 19:00:47,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 19:00:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 50647 states and 68990 transitions. [2021-12-17 19:00:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 19:00:47,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:47,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:48,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-17 19:00:48,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 19:00:48,209 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-17 19:00:48,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:48,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375253254] [2021-12-17 19:00:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:48,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 19:00:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 19:00:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 19:00:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 19:00:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 19:00:48,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375253254] [2021-12-17 19:00:48,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375253254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:48,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:48,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 19:00:48,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909811634] [2021-12-17 19:00:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:48,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 19:00:48,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 19:00:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 19:00:48,481 INFO L87 Difference]: Start difference. First operand 50647 states and 68990 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 19:00:49,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:49,878 INFO L93 Difference]: Finished difference Result 96777 states and 129475 transitions. [2021-12-17 19:00:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 19:00:49,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-17 19:00:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:50,228 INFO L225 Difference]: With dead ends: 96777 [2021-12-17 19:00:50,228 INFO L226 Difference]: Without dead ends: 48275 [2021-12-17 19:00:50,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:50,307 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 282 mSDsluCounter, 12008 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16144 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:50,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16144 Invalid, 207 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 19:00:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48275 states. [2021-12-17 19:00:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48275 to 45869. [2021-12-17 19:00:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45869 states, 39502 states have (on average 1.3101868259834946) internal successors, (51755), 40355 states have internal predecessors, (51755), 3045 states have call successors, (3045), 2312 states have call predecessors, (3045), 3320 states have return successors, (6785), 3233 states have call predecessors, (6785), 3045 states have call successors, (6785) [2021-12-17 19:00:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45869 states to 45869 states and 61585 transitions. [2021-12-17 19:00:52,291 INFO L78 Accepts]: Start accepts. Automaton has 45869 states and 61585 transitions. Word has length 160 [2021-12-17 19:00:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:52,291 INFO L470 AbstractCegarLoop]: Abstraction has 45869 states and 61585 transitions. [2021-12-17 19:00:52,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 19:00:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 45869 states and 61585 transitions. [2021-12-17 19:00:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 19:00:52,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:52,377 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 19:00:52,377 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:52,377 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-17 19:00:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252727407] [2021-12-17 19:00:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:52,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 19:00:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 19:00:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 19:00:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 19:00:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 19:00:52,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252727407] [2021-12-17 19:00:52,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252727407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:52,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:52,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 19:00:52,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668722692] [2021-12-17 19:00:52,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:52,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 19:00:52,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:52,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 19:00:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 19:00:52,651 INFO L87 Difference]: Start difference. First operand 45869 states and 61585 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 19:00:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:54,008 INFO L93 Difference]: Finished difference Result 81932 states and 108692 transitions. [2021-12-17 19:00:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 19:00:54,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-17 19:00:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:54,106 INFO L225 Difference]: With dead ends: 81932 [2021-12-17 19:00:54,106 INFO L226 Difference]: Without dead ends: 38200 [2021-12-17 19:00:54,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:54,168 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 282 mSDsluCounter, 12007 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16142 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:54,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16142 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 19:00:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38200 states. [2021-12-17 19:00:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38200 to 35792. [2021-12-17 19:00:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35792 states, 30955 states have (on average 1.3250524955580683) internal successors, (41017), 31577 states have internal predecessors, (41017), 2323 states have call successors, (2323), 1776 states have call predecessors, (2323), 2512 states have return successors, (4855), 2454 states have call predecessors, (4855), 2323 states have call successors, (4855) [2021-12-17 19:00:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 48195 transitions. [2021-12-17 19:00:55,504 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 48195 transitions. Word has length 160 [2021-12-17 19:00:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:55,505 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 48195 transitions. [2021-12-17 19:00:55,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 19:00:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 48195 transitions. [2021-12-17 19:00:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 19:00:55,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:55,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:55,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 19:00:55,552 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-17 19:00:55,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171494812] [2021-12-17 19:00:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:55,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 19:00:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 19:00:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 19:00:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 19:00:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 19:00:55,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:55,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171494812] [2021-12-17 19:00:55,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171494812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921055084] [2021-12-17 19:00:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:55,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:55,726 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) [2021-12-17 19:00:55,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 19:00:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:00:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 19:00:56,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:56,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921055084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:56,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:56,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:56,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713909912] [2021-12-17 19:00:56,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:56,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:56,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:56,045 INFO L87 Difference]: Start difference. First operand 35792 states and 48195 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 19:00:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:57,274 INFO L93 Difference]: Finished difference Result 59772 states and 81983 transitions. [2021-12-17 19:00:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:00:57,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-17 19:00:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:57,375 INFO L225 Difference]: With dead ends: 59772 [2021-12-17 19:00:57,376 INFO L226 Difference]: Without dead ends: 35962 [2021-12-17 19:00:57,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:57,432 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 130 mSDsluCounter, 4115 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8382 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:57,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8382 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:00:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35962 states. [2021-12-17 19:00:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35962 to 35792. [2021-12-17 19:00:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35792 states, 30955 states have (on average 1.3027620739783556) internal successors, (40327), 31577 states have internal predecessors, (40327), 2323 states have call successors, (2323), 1776 states have call predecessors, (2323), 2512 states have return successors, (4855), 2454 states have call predecessors, (4855), 2323 states have call successors, (4855) [2021-12-17 19:00:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 47505 transitions. [2021-12-17 19:00:58,672 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 47505 transitions. Word has length 162 [2021-12-17 19:00:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:58,672 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 47505 transitions. [2021-12-17 19:00:58,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 19:00:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 47505 transitions. [2021-12-17 19:00:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 19:00:58,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:58,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:58,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 19:00:59,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 19:00:59,040 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-17 19:00:59,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:59,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426216623] [2021-12-17 19:00:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:59,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:00:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:00:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:00:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:00:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 19:00:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 19:00:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 19:00:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:00:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 19:00:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 19:00:59,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426216623] [2021-12-17 19:00:59,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426216623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:00:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312558840] [2021-12-17 19:00:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:59,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:00:59,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:59,109 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) [2021-12-17 19:00:59,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 19:00:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:00:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:00:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 19:00:59,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:00:59,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312558840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:59,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:00:59,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:00:59,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934621486] [2021-12-17 19:00:59,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:59,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:00:59,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:00:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:00:59,408 INFO L87 Difference]: Start difference. First operand 35792 states and 47505 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:01:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:00,457 INFO L93 Difference]: Finished difference Result 62057 states and 83039 transitions. [2021-12-17 19:01:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:00,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2021-12-17 19:01:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:00,611 INFO L225 Difference]: With dead ends: 62057 [2021-12-17 19:01:00,612 INFO L226 Difference]: Without dead ends: 30866 [2021-12-17 19:01:00,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:00,650 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 4110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4167 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:00,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 4167 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30866 states. [2021-12-17 19:01:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30866 to 29554. [2021-12-17 19:01:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2758755015387013) internal successors, (32753), 26155 states have internal predecessors, (32753), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-17 19:01:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 38215 transitions. [2021-12-17 19:01:01,592 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 38215 transitions. Word has length 162 [2021-12-17 19:01:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:01,593 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 38215 transitions. [2021-12-17 19:01:01,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:01:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 38215 transitions. [2021-12-17 19:01:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 19:01:01,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:01,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:01:01,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 19:01:01,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 19:01:01,840 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1892311936, now seen corresponding path program 1 times [2021-12-17 19:01:01,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:01,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452097693] [2021-12-17 19:01:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:01,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:01:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:01:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:01:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:01:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 19:01:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 19:01:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 19:01:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 19:01:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 19:01:01,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:01,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452097693] [2021-12-17 19:01:01,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452097693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:01,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805836635] [2021-12-17 19:01:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:01,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:01,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:01,935 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) [2021-12-17 19:01:01,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 19:01:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:01:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 19:01:02,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:02,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805836635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:02,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:02,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:01:02,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181873148] [2021-12-17 19:01:02,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:02,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:02,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:02,233 INFO L87 Difference]: Start difference. First operand 29554 states and 38215 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 19:01:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:03,166 INFO L93 Difference]: Finished difference Result 49138 states and 64365 transitions. [2021-12-17 19:01:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:03,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-17 19:01:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:03,232 INFO L225 Difference]: With dead ends: 49138 [2021-12-17 19:01:03,232 INFO L226 Difference]: Without dead ends: 29688 [2021-12-17 19:01:03,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:03,266 INFO L933 BasicCegarLoop]: 4271 mSDtfsCounter, 123 mSDsluCounter, 4114 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 8385 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:03,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 8385 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29688 states. [2021-12-17 19:01:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29688 to 29554. [2021-12-17 19:01:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2505551010868294) internal successors, (32103), 26155 states have internal predecessors, (32103), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-17 19:01:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37565 transitions. [2021-12-17 19:01:04,374 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37565 transitions. Word has length 162 [2021-12-17 19:01:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:04,374 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37565 transitions. [2021-12-17 19:01:04,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 19:01:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37565 transitions. [2021-12-17 19:01:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 19:01:04,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:04,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:01:04,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-17 19:01:04,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:04,616 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1316943992, now seen corresponding path program 1 times [2021-12-17 19:01:04,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:04,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923818445] [2021-12-17 19:01:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:04,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:01:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:01:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:01:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:01:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 19:01:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 19:01:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 19:01:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-17 19:01:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 19:01:04,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923818445] [2021-12-17 19:01:04,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923818445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395206146] [2021-12-17 19:01:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:04,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:04,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:04,744 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) [2021-12-17 19:01:04,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 19:01:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:01:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 19:01:05,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:05,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395206146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:05,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:05,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:01:05,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171325989] [2021-12-17 19:01:05,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:05,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:05,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:05,026 INFO L87 Difference]: Start difference. First operand 29554 states and 37565 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:01:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:05,977 INFO L93 Difference]: Finished difference Result 42489 states and 54427 transitions. [2021-12-17 19:01:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2021-12-17 19:01:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:06,038 INFO L225 Difference]: With dead ends: 42489 [2021-12-17 19:01:06,039 INFO L226 Difference]: Without dead ends: 29599 [2021-12-17 19:01:06,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:06,067 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 144 mSDsluCounter, 4118 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 8365 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:06,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 8365 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29599 states. [2021-12-17 19:01:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29599 to 29554. [2021-12-17 19:01:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2412060301507537) internal successors, (31863), 26155 states have internal predecessors, (31863), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-17 19:01:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37325 transitions. [2021-12-17 19:01:07,238 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37325 transitions. Word has length 163 [2021-12-17 19:01:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:07,239 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37325 transitions. [2021-12-17 19:01:07,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:01:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37325 transitions. [2021-12-17 19:01:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 19:01:07,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:07,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:01:07,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 19:01:07,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:07,486 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1712947354, now seen corresponding path program 1 times [2021-12-17 19:01:07,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:07,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57607254] [2021-12-17 19:01:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:07,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 19:01:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 19:01:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 19:01:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 19:01:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 19:01:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 19:01:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 19:01:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-17 19:01:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-17 19:01:07,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:07,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57607254] [2021-12-17 19:01:07,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57607254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:07,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053255898] [2021-12-17 19:01:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:07,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:07,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:07,565 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) [2021-12-17 19:01:07,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 19:01:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:07,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:01:07,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 19:01:07,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:07,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053255898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:07,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:07,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:01:07,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956677647] [2021-12-17 19:01:07,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:07,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:07,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:07,843 INFO L87 Difference]: Start difference. First operand 29554 states and 37325 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)