./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_label42+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 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:10:28,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:10:28,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:10:28,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:10:28,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:10:28,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:10:28,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:10:28,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:10:28,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:10:28,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:10:28,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:10:28,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:10:28,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:10:28,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:10:28,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:10:28,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:10:28,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:10:28,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:10:28,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:10:28,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:10:28,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:10:28,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:10:28,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:10:28,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:10:28,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:10:28,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:10:28,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:10:28,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:10:28,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:10:28,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:10:28,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:10:28,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:10:28,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:10:28,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:10:28,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:10:28,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:10:28,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:10:28,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:10:28,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:10:28,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:10:28,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:10:28,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:10:28,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:10:28,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:10:28,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:10:28,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:10:28,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:10:28,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:10:28,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:10:28,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:10:28,391 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:10:28,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:10:28,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:10:28,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:10:28,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:10:28,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:10:28,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:10:28,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:10:28,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:10:28,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:10:28,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:10:28,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:10:28,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:10:28,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:10:28,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:10:28,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:10:28,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:10:28,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:10:28,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:10:28,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 [2021-12-21 14:10:28,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:10:28,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:10:28,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:10:28,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:10:28,577 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:10:28,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c [2021-12-21 14:10:28,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1a4ce53/e9b2be2e1fd340a99a1abfe93516b3ef/FLAGae09f8c65 [2021-12-21 14:10:29,292 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:10:29,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c [2021-12-21 14:10:29,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1a4ce53/e9b2be2e1fd340a99a1abfe93516b3ef/FLAGae09f8c65 [2021-12-21 14:10:29,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1a4ce53/e9b2be2e1fd340a99a1abfe93516b3ef [2021-12-21 14:10:29,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:10:29,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:10:29,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:10:29,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:10:29,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:10:29,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:10:29" (1/1) ... [2021-12-21 14:10:29,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8b6d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:29, skipping insertion in model container [2021-12-21 14:10:29,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:10:29" (1/1) ... [2021-12-21 14:10:29,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:10:29,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:10:30,935 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_label42+token_ring.02.cil-1.c[378560,378573] [2021-12-21 14:10:30,953 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_label42+token_ring.02.cil-1.c[383339,383352] [2021-12-21 14:10:31,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:10:31,068 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:10:31,660 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_label42+token_ring.02.cil-1.c[378560,378573] [2021-12-21 14:10:31,664 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_label42+token_ring.02.cil-1.c[383339,383352] [2021-12-21 14:10:31,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:10:31,715 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:10:31,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31 WrapperNode [2021-12-21 14:10:31,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:10:31,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:10:31,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:10:31,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:10:31,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:31,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,122 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-21 14:10:32,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:10:32,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:10:32,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:10:32,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:10:32,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:10:32,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:10:32,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:10:32,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:10:32,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (1/1) ... [2021-12-21 14:10:32,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:10:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:32,469 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) [2021-12-21 14:10:32,525 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 [2021-12-21 14:10:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:10:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-21 14:10:32,553 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-21 14:10:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-21 14:10:32,556 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-21 14:10:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:10:32,556 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:10:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-21 14:10:32,556 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-21 14:10:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-21 14:10:32,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-21 14:10:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:10:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-21 14:10:32,557 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-21 14:10:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:10:32,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:10:32,652 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:10:32,653 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:10:37,311 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:10:37,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:10:37,331 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-21 14:10:37,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:10:37 BoogieIcfgContainer [2021-12-21 14:10:37,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:10:37,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:10:37,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:10:37,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:10:37,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:10:29" (1/3) ... [2021-12-21 14:10:37,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fef0005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:10:37, skipping insertion in model container [2021-12-21 14:10:37,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:10:31" (2/3) ... [2021-12-21 14:10:37,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fef0005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:10:37, skipping insertion in model container [2021-12-21 14:10:37,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:10:37" (3/3) ... [2021-12-21 14:10:37,342 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.02.cil-1.c [2021-12-21 14:10:37,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:10:37,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:10:37,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:10:37,386 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 [2021-12-21 14:10:37,386 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:10:37,422 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) [2021-12-21 14:10:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:10:37,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:37,429 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] [2021-12-21 14:10:37,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-21 14:10:37,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:37,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939766768] [2021-12-21 14:10:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:37,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:37,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:37,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:10:37,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:37,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939766768] [2021-12-21 14:10:37,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939766768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:37,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:10:37,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:10:37,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516245737] [2021-12-21 14:10:37,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:37,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:10:37,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:10:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:10:37,756 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) [2021-12-21 14:10:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:38,438 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-21 14:10:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:10:38,453 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 [2021-12-21 14:10:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:38,485 INFO L225 Difference]: With dead ends: 4802 [2021-12-21 14:10:38,486 INFO L226 Difference]: Without dead ends: 2427 [2021-12-21 14:10:38,495 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 [2021-12-21 14:10:38,498 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, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:10:38,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:10:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-21 14:10:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-21 14:10:38,608 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) [2021-12-21 14:10:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-21 14:10:38,617 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-21 14:10:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-21 14:10:38,618 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) [2021-12-21 14:10:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-21 14:10:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:10:38,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:38,626 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] [2021-12-21 14:10:38,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:10:38,626 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-21 14:10:38,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824387733] [2021-12-21 14:10:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:38,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:38,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:38,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:38,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:38,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:38,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:10:38,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:38,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824387733] [2021-12-21 14:10:38,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824387733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:38,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:10:38,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:10:38,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225317214] [2021-12-21 14:10:38,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:38,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:10:38,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:10:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:10:38,775 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) [2021-12-21 14:10:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:39,538 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-21 14:10:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:10:39,539 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 [2021-12-21 14:10:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:39,549 INFO L225 Difference]: With dead ends: 2807 [2021-12-21 14:10:39,549 INFO L226 Difference]: Without dead ends: 2574 [2021-12-21 14:10:39,553 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 [2021-12-21 14:10:39,554 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16464 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20710 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:10:39,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20710 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:10:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-21 14:10:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-21 14:10:39,602 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) [2021-12-21 14:10:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-21 14:10:39,610 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-21 14:10:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:39,611 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-21 14:10:39,611 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) [2021-12-21 14:10:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-21 14:10:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:10:39,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:39,613 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] [2021-12-21 14:10:39,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:10:39,614 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-21 14:10:39,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:39,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490086139] [2021-12-21 14:10:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:39,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:39,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:39,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:39,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:39,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:39,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:10:39,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490086139] [2021-12-21 14:10:39,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490086139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:39,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:10:39,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:10:39,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731215615] [2021-12-21 14:10:39,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:39,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:10:39,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:10:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:10:39,757 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) [2021-12-21 14:10:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:40,393 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-21 14:10:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:10:40,393 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 [2021-12-21 14:10:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:40,402 INFO L225 Difference]: With dead ends: 3193 [2021-12-21 14:10:40,403 INFO L226 Difference]: Without dead ends: 2851 [2021-12-21 14:10:40,404 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 [2021-12-21 14:10:40,405 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16279 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2021-12-21 14:10:40,405 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] [2021-12-21 14:10:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-21 14:10:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-21 14:10:40,447 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) [2021-12-21 14:10:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-21 14:10:40,455 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-21 14:10:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:40,455 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-21 14:10:40,455 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) [2021-12-21 14:10:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-21 14:10:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:10:40,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:40,457 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] [2021-12-21 14:10:40,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:10:40,457 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-21 14:10:40,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:40,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170741500] [2021-12-21 14:10:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:40,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:40,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:40,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:40,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:10:40,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170741500] [2021-12-21 14:10:40,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170741500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:40,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:10:40,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:10:40,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036731597] [2021-12-21 14:10:40,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:40,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:10:40,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:10:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:10:40,533 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) [2021-12-21 14:10:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:41,293 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-21 14:10:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:10:41,293 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 [2021-12-21 14:10:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:41,306 INFO L225 Difference]: With dead ends: 4037 [2021-12-21 14:10:41,307 INFO L226 Difference]: Without dead ends: 3476 [2021-12-21 14:10:41,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:10:41,320 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:10:41,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20704 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:10:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-21 14:10:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-21 14:10:41,398 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) [2021-12-21 14:10:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-21 14:10:41,411 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-21 14:10:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:41,411 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-21 14:10:41,412 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) [2021-12-21 14:10:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-21 14:10:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:10:41,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:41,413 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] [2021-12-21 14:10:41,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:10:41,413 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:41,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-21 14:10:41,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:41,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013007112] [2021-12-21 14:10:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:41,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:41,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:41,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:41,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:41,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:41,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:10:41,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:41,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013007112] [2021-12-21 14:10:41,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013007112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:41,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:10:41,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:10:41,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397545000] [2021-12-21 14:10:41,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:10:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:41,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:10:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:10:41,487 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) [2021-12-21 14:10:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:42,235 INFO L93 Difference]: Finished difference Result 5435 states and 8809 transitions. [2021-12-21 14:10:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:10:42,236 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 [2021-12-21 14:10:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:42,249 INFO L225 Difference]: With dead ends: 5435 [2021-12-21 14:10:42,250 INFO L226 Difference]: Without dead ends: 4462 [2021-12-21 14:10:42,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:10:42,253 INFO L933 BasicCegarLoop]: 4224 mSDtfsCounter, 4362 mSDsluCounter, 16452 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20676 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:10:42,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4374 Valid, 20676 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:10:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-12-21 14:10:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3941. [2021-12-21 14:10:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3645 states have (on average 1.696570644718793) internal successors, (6184), 3663 states have internal predecessors, (6184), 176 states have call successors, (176), 102 states have call predecessors, (176), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-21 14:10:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 6633 transitions. [2021-12-21 14:10:42,344 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 6633 transitions. Word has length 68 [2021-12-21 14:10:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:42,344 INFO L470 AbstractCegarLoop]: Abstraction has 3941 states and 6633 transitions. [2021-12-21 14:10:42,345 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) [2021-12-21 14:10:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 6633 transitions. [2021-12-21 14:10:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:10:42,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:42,347 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] [2021-12-21 14:10:42,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:10:42,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-21 14:10:42,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:42,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339470438] [2021-12-21 14:10:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:42,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:42,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:42,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:42,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:42,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:10:42,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339470438] [2021-12-21 14:10:42,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339470438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:42,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:10:42,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:10:42,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209981674] [2021-12-21 14:10:42,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:42,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:10:42,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:42,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:10:42,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:10:42,406 INFO L87 Difference]: Start difference. First operand 3941 states and 6633 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) [2021-12-21 14:10:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:43,000 INFO L93 Difference]: Finished difference Result 7278 states and 11576 transitions. [2021-12-21 14:10:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:10:43,001 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 [2021-12-21 14:10:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:43,018 INFO L225 Difference]: With dead ends: 7278 [2021-12-21 14:10:43,018 INFO L226 Difference]: Without dead ends: 5469 [2021-12-21 14:10:43,024 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 [2021-12-21 14:10:43,025 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 4485 mSDsluCounter, 12257 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 16557 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:10:43,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4510 Valid, 16557 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:10:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-12-21 14:10:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4882. [2021-12-21 14:10:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4882 states, 4428 states have (on average 1.6456639566395663) internal successors, (7287), 4463 states have internal predecessors, (7287), 272 states have call successors, (272), 156 states have call predecessors, (272), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-21 14:10:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 7956 transitions. [2021-12-21 14:10:43,146 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 7956 transitions. Word has length 68 [2021-12-21 14:10:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:43,146 INFO L470 AbstractCegarLoop]: Abstraction has 4882 states and 7956 transitions. [2021-12-21 14:10:43,146 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) [2021-12-21 14:10:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 7956 transitions. [2021-12-21 14:10:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 14:10:43,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:43,152 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] [2021-12-21 14:10:43,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:10:43,153 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-21 14:10:43,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:43,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572405026] [2021-12-21 14:10:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:43,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:10:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:10:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:10:43,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572405026] [2021-12-21 14:10:43,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572405026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:43,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338625519] [2021-12-21 14:10:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:43,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:43,262 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) [2021-12-21 14:10:43,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:10:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:10:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:10:43,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:43,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338625519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:43,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:43,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:10:43,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485172420] [2021-12-21 14:10:43,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:43,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:43,535 INFO L87 Difference]: Start difference. First operand 4882 states and 7956 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) [2021-12-21 14:10:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:43,688 INFO L93 Difference]: Finished difference Result 10239 states and 15790 transitions. [2021-12-21 14:10:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:10:43,689 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 [2021-12-21 14:10:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:43,783 INFO L225 Difference]: With dead ends: 10239 [2021-12-21 14:10:43,783 INFO L226 Difference]: Without dead ends: 7489 [2021-12-21 14:10:43,794 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 [2021-12-21 14:10:43,794 INFO L933 BasicCegarLoop]: 4150 mSDtfsCounter, 4098 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4309 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 [2021-12-21 14:10:43,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4309 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:10:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7489 states. [2021-12-21 14:10:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7489 to 7435. [2021-12-21 14:10:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 6567 states have (on average 1.5784985533729252) internal successors, (10366), 6635 states have internal predecessors, (10366), 510 states have call successors, (510), 308 states have call predecessors, (510), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-21 14:10:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 11621 transitions. [2021-12-21 14:10:44,034 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 11621 transitions. Word has length 110 [2021-12-21 14:10:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:44,034 INFO L470 AbstractCegarLoop]: Abstraction has 7435 states and 11621 transitions. [2021-12-21 14:10:44,035 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) [2021-12-21 14:10:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 11621 transitions. [2021-12-21 14:10:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 14:10:44,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:44,043 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] [2021-12-21 14:10:44,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:10:44,255 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 [2021-12-21 14:10:44,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-21 14:10:44,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587717863] [2021-12-21 14:10:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:44,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:10:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:10:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:10:44,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587717863] [2021-12-21 14:10:44,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587717863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985909564] [2021-12-21 14:10:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:44,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:44,353 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) [2021-12-21 14:10:44,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:10:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:10:44,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 14:10:44,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:44,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985909564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:44,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:44,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:10:44,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217427705] [2021-12-21 14:10:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:44,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:44,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:44,575 INFO L87 Difference]: Start difference. First operand 7435 states and 11621 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) [2021-12-21 14:10:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:44,868 INFO L93 Difference]: Finished difference Result 17751 states and 26795 transitions. [2021-12-21 14:10:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:10:44,869 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 [2021-12-21 14:10:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:44,910 INFO L225 Difference]: With dead ends: 17751 [2021-12-21 14:10:44,910 INFO L226 Difference]: Without dead ends: 12449 [2021-12-21 14:10:44,929 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 [2021-12-21 14:10:44,930 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 154 mSDsluCounter, 4138 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8437 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 [2021-12-21 14:10:44,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8437 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:10:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-12-21 14:10:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 12449. [2021-12-21 14:10:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12449 states, 10768 states have (on average 1.5169947994056463) internal successors, (16335), 10885 states have internal predecessors, (16335), 975 states have call successors, (975), 608 states have call predecessors, (975), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-21 14:10:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12449 states to 12449 states and 18906 transitions. [2021-12-21 14:10:45,379 INFO L78 Accepts]: Start accepts. Automaton has 12449 states and 18906 transitions. Word has length 110 [2021-12-21 14:10:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:45,380 INFO L470 AbstractCegarLoop]: Abstraction has 12449 states and 18906 transitions. [2021-12-21 14:10:45,380 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) [2021-12-21 14:10:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 12449 states and 18906 transitions. [2021-12-21 14:10:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 14:10:45,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:45,402 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] [2021-12-21 14:10:45,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:10:45,623 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 [2021-12-21 14:10:45,623 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-21 14:10:45,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:45,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700179855] [2021-12-21 14:10:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:45,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:10:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:10:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-21 14:10:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 14:10:45,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700179855] [2021-12-21 14:10:45,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700179855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209486052] [2021-12-21 14:10:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:45,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:45,728 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) [2021-12-21 14:10:45,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:10:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:10:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 14:10:46,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:46,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209486052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:46,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:46,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:10:46,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291716948] [2021-12-21 14:10:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:46,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:46,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:46,003 INFO L87 Difference]: Start difference. First operand 12449 states and 18906 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) [2021-12-21 14:10:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:46,533 INFO L93 Difference]: Finished difference Result 32641 states and 48463 transitions. [2021-12-21 14:10:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:10:46,534 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 [2021-12-21 14:10:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:46,602 INFO L225 Difference]: With dead ends: 32641 [2021-12-21 14:10:46,603 INFO L226 Difference]: Without dead ends: 22329 [2021-12-21 14:10:46,635 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 [2021-12-21 14:10:46,636 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4056 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4056 SdHoareTripleChecker+Valid, 4318 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 [2021-12-21 14:10:46,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4056 Valid, 4318 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:10:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22329 states. [2021-12-21 14:10:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22329 to 22119. [2021-12-21 14:10:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22119 states, 18858 states have (on average 1.4761374482978047) internal successors, (27837), 19089 states have internal predecessors, (27837), 1869 states have call successors, (1869), 1198 states have call predecessors, (1869), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-21 14:10:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22119 states to 22119 states and 32744 transitions. [2021-12-21 14:10:47,251 INFO L78 Accepts]: Start accepts. Automaton has 22119 states and 32744 transitions. Word has length 142 [2021-12-21 14:10:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:47,251 INFO L470 AbstractCegarLoop]: Abstraction has 22119 states and 32744 transitions. [2021-12-21 14:10:47,252 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) [2021-12-21 14:10:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22119 states and 32744 transitions. [2021-12-21 14:10:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 14:10:47,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:47,296 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] [2021-12-21 14:10:47,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:10:47,513 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 [2021-12-21 14:10:47,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:47,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-21 14:10:47,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:47,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755795223] [2021-12-21 14:10:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:47,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 14:10:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:10:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 14:10:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 14:10:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 14:10:47,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:47,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755795223] [2021-12-21 14:10:47,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755795223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:47,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918167827] [2021-12-21 14:10:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:47,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:47,604 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) [2021-12-21 14:10:47,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:10:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:10:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:10:47,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918167827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:47,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:10:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463420055] [2021-12-21 14:10:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:47,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:47,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:47,931 INFO L87 Difference]: Start difference. First operand 22119 states and 32744 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) [2021-12-21 14:10:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:48,545 INFO L93 Difference]: Finished difference Result 44457 states and 65784 transitions. [2021-12-21 14:10:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:10:48,545 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 [2021-12-21 14:10:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:48,623 INFO L225 Difference]: With dead ends: 44457 [2021-12-21 14:10:48,623 INFO L226 Difference]: Without dead ends: 24473 [2021-12-21 14:10:48,677 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 [2021-12-21 14:10:48,677 INFO L933 BasicCegarLoop]: 4137 mSDtfsCounter, 4075 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4075 SdHoareTripleChecker+Valid, 4171 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 [2021-12-21 14:10:48,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4075 Valid, 4171 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:10:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24473 states. [2021-12-21 14:10:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24473 to 24473. [2021-12-21 14:10:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24473 states, 21000 states have (on average 1.4191904761904761) internal successors, (29803), 21231 states have internal predecessors, (29803), 1923 states have call successors, (1923), 1356 states have call predecessors, (1923), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-21 14:10:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24473 states to 24473 states and 34832 transitions. [2021-12-21 14:10:49,525 INFO L78 Accepts]: Start accepts. Automaton has 24473 states and 34832 transitions. Word has length 159 [2021-12-21 14:10:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:49,525 INFO L470 AbstractCegarLoop]: Abstraction has 24473 states and 34832 transitions. [2021-12-21 14:10:49,526 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) [2021-12-21 14:10:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24473 states and 34832 transitions. [2021-12-21 14:10:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 14:10:49,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:49,578 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] [2021-12-21 14:10:49,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:10:49,795 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 [2021-12-21 14:10:49,795 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-21 14:10:49,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:49,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193662823] [2021-12-21 14:10:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:49,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 14:10:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:10:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 14:10:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 14:10:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:10:49,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:49,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193662823] [2021-12-21 14:10:49,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193662823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:49,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426711553] [2021-12-21 14:10:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:49,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:49,893 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) [2021-12-21 14:10:49,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 14:10:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:10:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-21 14:10:50,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:50,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426711553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:50,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:50,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:10:50,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505142377] [2021-12-21 14:10:50,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:50,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:50,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:50,205 INFO L87 Difference]: Start difference. First operand 24473 states and 34832 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) [2021-12-21 14:10:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:51,010 INFO L93 Difference]: Finished difference Result 41324 states and 58008 transitions. [2021-12-21 14:10:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:10:51,011 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 [2021-12-21 14:10:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:51,105 INFO L225 Difference]: With dead ends: 41324 [2021-12-21 14:10:51,106 INFO L226 Difference]: Without dead ends: 26013 [2021-12-21 14:10:51,142 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 [2021-12-21 14:10:51,142 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4088 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4325 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 [2021-12-21 14:10:51,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4325 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:10:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26013 states. [2021-12-21 14:10:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26013 to 25873. [2021-12-21 14:10:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25873 states, 22288 states have (on average 1.3940685570710696) internal successors, (31071), 22519 states have internal predecessors, (31071), 1943 states have call successors, (1943), 1448 states have call predecessors, (1943), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-21 14:10:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25873 states to 25873 states and 36232 transitions. [2021-12-21 14:10:52,097 INFO L78 Accepts]: Start accepts. Automaton has 25873 states and 36232 transitions. Word has length 159 [2021-12-21 14:10:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:52,097 INFO L470 AbstractCegarLoop]: Abstraction has 25873 states and 36232 transitions. [2021-12-21 14:10:52,097 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) [2021-12-21 14:10:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25873 states and 36232 transitions. [2021-12-21 14:10:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:10:52,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:52,139 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] [2021-12-21 14:10:52,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 14:10:52,356 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 [2021-12-21 14:10:52,357 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:52,357 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-21 14:10:52,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:52,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189179788] [2021-12-21 14:10:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:52,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:10:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:10:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 14:10:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:10:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 14:10:52,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189179788] [2021-12-21 14:10:52,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189179788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288967166] [2021-12-21 14:10:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:52,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:52,440 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) [2021-12-21 14:10:52,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 14:10:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:10:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-21 14:10:52,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:52,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288967166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:52,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:52,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:10:52,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890593780] [2021-12-21 14:10:52,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:52,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:52,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:52,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:52,745 INFO L87 Difference]: Start difference. First operand 25873 states and 36232 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) [2021-12-21 14:10:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:53,799 INFO L93 Difference]: Finished difference Result 70245 states and 97750 transitions. [2021-12-21 14:10:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:10:53,799 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 [2021-12-21 14:10:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:53,935 INFO L225 Difference]: With dead ends: 70245 [2021-12-21 14:10:53,935 INFO L226 Difference]: Without dead ends: 46511 [2021-12-21 14:10:53,988 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 [2021-12-21 14:10:53,989 INFO L933 BasicCegarLoop]: 4172 mSDtfsCounter, 4102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 4334 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 [2021-12-21 14:10:53,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 4334 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:10:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46511 states. [2021-12-21 14:10:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46511 to 45781. [2021-12-21 14:10:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45781 states, 39030 states have (on average 1.3636945939021266) internal successors, (53225), 39491 states have internal predecessors, (53225), 3677 states have call successors, (3677), 2688 states have call predecessors, (3677), 3072 states have return successors, (7178), 3665 states have call predecessors, (7178), 3677 states have call successors, (7178) [2021-12-21 14:10:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45781 states to 45781 states and 64080 transitions. [2021-12-21 14:10:55,523 INFO L78 Accepts]: Start accepts. Automaton has 45781 states and 64080 transitions. Word has length 160 [2021-12-21 14:10:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:55,523 INFO L470 AbstractCegarLoop]: Abstraction has 45781 states and 64080 transitions. [2021-12-21 14:10:55,523 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) [2021-12-21 14:10:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 45781 states and 64080 transitions. [2021-12-21 14:10:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:10:55,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:55,605 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] [2021-12-21 14:10:55,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 14:10:55,822 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 [2021-12-21 14:10:55,822 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:55,823 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-21 14:10:55,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:55,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742104207] [2021-12-21 14:10:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:55,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:10:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:10:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:10:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:10:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:10:55,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:55,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742104207] [2021-12-21 14:10:55,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742104207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:55,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158524528] [2021-12-21 14:10:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:55,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:55,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:55,926 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) [2021-12-21 14:10:55,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 14:10:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:10:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:10:56,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:56,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158524528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:56,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:56,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:10:56,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871183915] [2021-12-21 14:10:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:56,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:56,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:56,218 INFO L87 Difference]: Start difference. First operand 45781 states and 64080 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) [2021-12-21 14:10:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:10:57,396 INFO L93 Difference]: Finished difference Result 75161 states and 105873 transitions. [2021-12-21 14:10:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:10:57,396 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 [2021-12-21 14:10:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:10:57,505 INFO L225 Difference]: With dead ends: 75161 [2021-12-21 14:10:57,506 INFO L226 Difference]: Without dead ends: 40527 [2021-12-21 14:10:57,567 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 [2021-12-21 14:10:57,567 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4089 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 4169 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 [2021-12-21 14:10:57,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 4169 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:10:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40527 states. [2021-12-21 14:10:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40527 to 29943. [2021-12-21 14:10:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29943 states, 25784 states have (on average 1.3390862550418865) internal successors, (34527), 26025 states have internal predecessors, (34527), 2245 states have call successors, (2245), 1720 states have call predecessors, (2245), 1912 states have return successors, (3934), 2229 states have call predecessors, (3934), 2245 states have call successors, (3934) [2021-12-21 14:10:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29943 states to 29943 states and 40706 transitions. [2021-12-21 14:10:59,201 INFO L78 Accepts]: Start accepts. Automaton has 29943 states and 40706 transitions. Word has length 160 [2021-12-21 14:10:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:10:59,202 INFO L470 AbstractCegarLoop]: Abstraction has 29943 states and 40706 transitions. [2021-12-21 14:10:59,202 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) [2021-12-21 14:10:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29943 states and 40706 transitions. [2021-12-21 14:10:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:10:59,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:10:59,246 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] [2021-12-21 14:10:59,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 14:10:59,459 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 [2021-12-21 14:10:59,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:10:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:10:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-21 14:10:59,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:10:59,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889039988] [2021-12-21 14:10:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:59,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:10:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:10:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:10:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:10:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:10:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:10:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:10:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:10:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:10:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:10:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:10:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:10:59,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:10:59,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889039988] [2021-12-21 14:10:59,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889039988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:10:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37551787] [2021-12-21 14:10:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:10:59,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:10:59,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:10:59,553 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) [2021-12-21 14:10:59,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 14:10:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:10:59,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:10:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:10:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:10:59,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:10:59,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37551787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:10:59,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:10:59,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:10:59,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177795253] [2021-12-21 14:10:59,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:10:59,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:10:59,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:10:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:10:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:10:59,851 INFO L87 Difference]: Start difference. First operand 29943 states and 40706 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) [2021-12-21 14:11:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:11:01,746 INFO L93 Difference]: Finished difference Result 82801 states and 112154 transitions. [2021-12-21 14:11:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:11:01,746 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 [2021-12-21 14:11:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:11:01,885 INFO L225 Difference]: With dead ends: 82801 [2021-12-21 14:11:01,885 INFO L226 Difference]: Without dead ends: 55005 [2021-12-21 14:11:01,927 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 [2021-12-21 14:11:01,927 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 [2021-12-21 14:11:01,928 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] [2021-12-21 14:11:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55005 states. [2021-12-21 14:11:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55005 to 53491. [2021-12-21 14:11:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53491 states, 45624 states have (on average 1.3054751884972822) internal successors, (59561), 46105 states have internal predecessors, (59561), 4265 states have call successors, (4265), 3216 states have call predecessors, (4265), 3600 states have return successors, (8740), 4233 states have call predecessors, (8740), 4265 states have call successors, (8740) [2021-12-21 14:11:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53491 states to 53491 states and 72566 transitions. [2021-12-21 14:11:03,934 INFO L78 Accepts]: Start accepts. Automaton has 53491 states and 72566 transitions. Word has length 160 [2021-12-21 14:11:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:11:03,934 INFO L470 AbstractCegarLoop]: Abstraction has 53491 states and 72566 transitions. [2021-12-21 14:11:03,935 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) [2021-12-21 14:11:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 53491 states and 72566 transitions. [2021-12-21 14:11:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:11:04,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:11:04,004 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] [2021-12-21 14:11:04,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 14:11:04,205 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 [2021-12-21 14:11:04,205 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:11:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:11:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-21 14:11:04,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:11:04,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313283105] [2021-12-21 14:11:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:04,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:11:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:11:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:11:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:11:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:11:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:11:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:11:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:11:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 14:11:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:11:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-21 14:11:04,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:11:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313283105] [2021-12-21 14:11:04,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313283105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:11:04,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:11:04,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:11:04,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320289684] [2021-12-21 14:11:04,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:11:04,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:11:04,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:11:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:11:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:11:04,262 INFO L87 Difference]: Start difference. First operand 53491 states and 72566 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) [2021-12-21 14:11:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:11:06,691 INFO L93 Difference]: Finished difference Result 102539 states and 136687 transitions. [2021-12-21 14:11:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:11:06,692 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 [2021-12-21 14:11:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:11:06,831 INFO L225 Difference]: With dead ends: 102539 [2021-12-21 14:11:06,831 INFO L226 Difference]: Without dead ends: 51193 [2021-12-21 14:11:06,907 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 [2021-12-21 14:11:06,908 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, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:11:06,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16144 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:11:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-12-21 14:11:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 48475. [2021-12-21 14:11:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48475 states, 41692 states have (on average 1.3054542837954524) internal successors, (54427), 42585 states have internal predecessors, (54427), 3253 states have call successors, (3253), 2472 states have call predecessors, (3253), 3528 states have return successors, (7133), 3449 states have call predecessors, (7133), 3253 states have call successors, (7133) [2021-12-21 14:11:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48475 states to 48475 states and 64813 transitions. [2021-12-21 14:11:09,080 INFO L78 Accepts]: Start accepts. Automaton has 48475 states and 64813 transitions. Word has length 160 [2021-12-21 14:11:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:11:09,080 INFO L470 AbstractCegarLoop]: Abstraction has 48475 states and 64813 transitions. [2021-12-21 14:11:09,080 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) [2021-12-21 14:11:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 48475 states and 64813 transitions. [2021-12-21 14:11:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:11:09,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:11:09,140 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] [2021-12-21 14:11:09,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:11:09,140 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:11:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:11:09,141 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-21 14:11:09,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:11:09,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489447574] [2021-12-21 14:11:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:09,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:11:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:11:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:11:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:11:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:11:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:11:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:11:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:11:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:11:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:11:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 14:11:09,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:11:09,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489447574] [2021-12-21 14:11:09,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489447574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:11:09,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:11:09,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:11:09,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153415825] [2021-12-21 14:11:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:11:09,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:11:09,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:11:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:11:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:11:09,197 INFO L87 Difference]: Start difference. First operand 48475 states and 64813 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) [2021-12-21 14:11:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:11:10,941 INFO L93 Difference]: Finished difference Result 86015 states and 113686 transitions. [2021-12-21 14:11:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:11:10,942 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 [2021-12-21 14:11:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:11:11,051 INFO L225 Difference]: With dead ends: 86015 [2021-12-21 14:11:11,052 INFO L226 Difference]: Without dead ends: 39677 [2021-12-21 14:11:11,123 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 [2021-12-21 14:11:11,123 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 [2021-12-21 14:11:11,124 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] [2021-12-21 14:11:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39677 states. [2021-12-21 14:11:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39677 to 37027. [2021-12-21 14:11:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37027 states, 31990 states have (on average 1.3210690840887778) internal successors, (42261), 32627 states have internal predecessors, (42261), 2427 states have call successors, (2427), 1856 states have call predecessors, (2427), 2608 states have return successors, (4967), 2559 states have call predecessors, (4967), 2427 states have call successors, (4967) [2021-12-21 14:11:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37027 states to 37027 states and 49655 transitions. [2021-12-21 14:11:12,897 INFO L78 Accepts]: Start accepts. Automaton has 37027 states and 49655 transitions. Word has length 160 [2021-12-21 14:11:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:11:12,898 INFO L470 AbstractCegarLoop]: Abstraction has 37027 states and 49655 transitions. [2021-12-21 14:11:12,898 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) [2021-12-21 14:11:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 37027 states and 49655 transitions. [2021-12-21 14:11:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 14:11:12,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:11:12,940 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] [2021-12-21 14:11:12,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:11:12,941 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:11:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:11:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-21 14:11:12,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:11:12,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705904720] [2021-12-21 14:11:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:12,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:11:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:11:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:12,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:11:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:12,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:11:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:12,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:11:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:12,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:11:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:12,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:11:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:13,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:11:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:13,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:13,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:11:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:13,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:13,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 14:11:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-21 14:11:13,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:11:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705904720] [2021-12-21 14:11:13,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705904720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:11:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809996095] [2021-12-21 14:11:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:13,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:11:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:11:13,027 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) [2021-12-21 14:11:13,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 14:11:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:11:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:11:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:11:13,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:11:13,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809996095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:11:13,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:11:13,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:11:13,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149382404] [2021-12-21 14:11:13,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:11:13,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:11:13,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:11:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:11:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:11:13,286 INFO L87 Difference]: Start difference. First operand 37027 states and 49655 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) [2021-12-21 14:11:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:11:14,568 INFO L93 Difference]: Finished difference Result 60935 states and 83299 transitions. [2021-12-21 14:11:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:11:14,569 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 [2021-12-21 14:11:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:11:14,673 INFO L225 Difference]: With dead ends: 60935 [2021-12-21 14:11:14,673 INFO L226 Difference]: Without dead ends: 37197 [2021-12-21 14:11:14,726 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 [2021-12-21 14:11:14,726 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 [2021-12-21 14:11:14,727 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] [2021-12-21 14:11:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37197 states. [2021-12-21 14:11:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37197 to 37027. [2021-12-21 14:11:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37027 states, 31990 states have (on average 1.2994998437011567) internal successors, (41571), 32627 states have internal predecessors, (41571), 2427 states have call successors, (2427), 1856 states have call predecessors, (2427), 2608 states have return successors, (4967), 2559 states have call predecessors, (4967), 2427 states have call successors, (4967) [2021-12-21 14:11:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37027 states to 37027 states and 48965 transitions. [2021-12-21 14:11:16,497 INFO L78 Accepts]: Start accepts. Automaton has 37027 states and 48965 transitions. Word has length 162 [2021-12-21 14:11:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:11:16,497 INFO L470 AbstractCegarLoop]: Abstraction has 37027 states and 48965 transitions. [2021-12-21 14:11:16,497 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) [2021-12-21 14:11:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 37027 states and 48965 transitions. [2021-12-21 14:11:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 14:11:16,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:11:16,544 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] [2021-12-21 14:11:16,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 14:11:16,744 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 [2021-12-21 14:11:16,745 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:11:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:11:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-21 14:11:16,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:11:16,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140016761] [2021-12-21 14:11:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:16,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:11:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:11:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:11:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:11:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:11:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:11:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:11:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:11:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:11:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 14:11:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-21 14:11:16,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:11:16,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140016761] [2021-12-21 14:11:16,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140016761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:11:16,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081988494] [2021-12-21 14:11:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:16,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:11:16,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:11:16,823 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) [2021-12-21 14:11:16,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 14:11:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:11:16,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:11:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 14:11:17,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:11:17,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081988494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:11:17,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:11:17,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:11:17,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923797432] [2021-12-21 14:11:17,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:11:17,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:11:17,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:11:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:11:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:11:17,082 INFO L87 Difference]: Start difference. First operand 37027 states and 48965 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) [2021-12-21 14:11:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:11:18,511 INFO L93 Difference]: Finished difference Result 64013 states and 85317 transitions. [2021-12-21 14:11:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:11:18,512 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 [2021-12-21 14:11:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:11:18,586 INFO L225 Difference]: With dead ends: 64013 [2021-12-21 14:11:18,587 INFO L226 Difference]: Without dead ends: 31587 [2021-12-21 14:11:18,635 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 [2021-12-21 14:11:18,636 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 [2021-12-21 14:11:18,636 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] [2021-12-21 14:11:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31587 states. [2021-12-21 14:11:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31587 to 30343. [2021-12-21 14:11:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30343 states, 26346 states have (on average 1.2746147422758674) internal successors, (33581), 26840 states have internal predecessors, (33581), 1931 states have call successors, (1931), 1480 states have call predecessors, (1931), 2064 states have return successors, (3669), 2030 states have call predecessors, (3669), 1931 states have call successors, (3669) [2021-12-21 14:11:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30343 states to 30343 states and 39181 transitions. [2021-12-21 14:11:20,086 INFO L78 Accepts]: Start accepts. Automaton has 30343 states and 39181 transitions. Word has length 162 [2021-12-21 14:11:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:11:20,086 INFO L470 AbstractCegarLoop]: Abstraction has 30343 states and 39181 transitions. [2021-12-21 14:11:20,086 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) [2021-12-21 14:11:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30343 states and 39181 transitions. [2021-12-21 14:11:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 14:11:20,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:11:20,111 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] [2021-12-21 14:11:20,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 14:11:20,311 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 [2021-12-21 14:11:20,311 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:11:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:11:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1892311936, now seen corresponding path program 1 times [2021-12-21 14:11:20,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:11:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74929853] [2021-12-21 14:11:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:20,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:11:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:11:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:11:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:11:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:11:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:11:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:11:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:11:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 14:11:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:11:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 14:11:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-21 14:11:20,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:11:20,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74929853] [2021-12-21 14:11:20,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74929853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:11:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936693468] [2021-12-21 14:11:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:11:20,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:11:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:11:20,398 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) [2021-12-21 14:11:20,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 14:11:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:11:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:11:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:11:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 14:11:20,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:11:20,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936693468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:11:20,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:11:20,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:11:20,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916896228] [2021-12-21 14:11:20,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:11:20,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:11:20,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:11:20,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:11:20,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:11:20,671 INFO L87 Difference]: Start difference. First operand 30343 states and 39181 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)