./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.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 94e951826a6b890c42a47666caa0401c27bf1b0a09941efa99a0e4bb1e9e9065 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:38:48,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:38:48,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:38:48,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:38:48,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:38:48,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:38:48,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:38:48,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:38:48,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:38:48,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:38:48,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:38:48,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:38:48,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:38:48,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:38:48,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:38:48,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:38:48,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:38:48,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:38:48,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:38:48,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:38:48,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:38:48,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:38:48,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:38:48,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:38:48,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:38:48,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:38:48,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:38:48,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:38:48,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:38:48,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:38:48,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:38:48,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:38:48,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:38:48,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:38:48,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:38:48,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:38:48,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:38:48,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:38:48,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:38:48,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:38:48,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:38:48,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:38:48,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:38:48,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:38:48,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:38:48,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:38:48,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:38:48,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:38:48,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:38:48,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:38:48,559 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:38:48,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:38:48,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:38:48,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:38:48,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:38:48,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:38:48,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:38:48,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:38:48,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:38:48,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:38:48,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:38:48,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:38:48,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:38:48,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:38:48,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:38:48,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:38:48,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:38:48,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:38:48,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:38:48,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:38:48,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:38:48,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:38:48,563 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:38:48,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:38:48,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:38:48,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:38:48,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94e951826a6b890c42a47666caa0401c27bf1b0a09941efa99a0e4bb1e9e9065 [2021-12-22 12:38:48,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:38:48,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:38:48,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:38:48,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:38:48,769 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:38:48,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c [2021-12-22 12:38:48,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20008992/c8f1b80deafb4b2197b9398ea9dec916/FLAGcf8e36dfd [2021-12-22 12:38:49,483 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:38:49,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c [2021-12-22 12:38:49,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20008992/c8f1b80deafb4b2197b9398ea9dec916/FLAGcf8e36dfd [2021-12-22 12:38:49,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20008992/c8f1b80deafb4b2197b9398ea9dec916 [2021-12-22 12:38:49,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:38:49,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:38:49,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:38:49,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:38:49,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:38:49,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:38:49" (1/1) ... [2021-12-22 12:38:49,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be76a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:49, skipping insertion in model container [2021-12-22 12:38:49,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:38:49" (1/1) ... [2021-12-22 12:38:49,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:38:49,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:38:50,913 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[382357,382370] [2021-12-22 12:38:50,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[383339,383352] [2021-12-22 12:38:51,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:38:51,081 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:38:51,766 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[382357,382370] [2021-12-22 12:38:51,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[383339,383352] [2021-12-22 12:38:51,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:38:51,826 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:38:51,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51 WrapperNode [2021-12-22 12:38:51,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:38:51,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:38:51,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:38:51,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:38:51,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:51,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,152 INFO L137 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12624 [2021-12-22 12:38:52,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:38:52,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:38:52,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:38:52,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:38:52,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:38:52,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:38:52,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:38:52,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:38:52,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (1/1) ... [2021-12-22 12:38:52,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:38:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:38:52,601 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) [2021-12-22 12:38:52,667 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 [2021-12-22 12:38:52,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:38:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-22 12:38:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-22 12:38:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-22 12:38:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-22 12:38:52,704 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-22 12:38:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-22 12:38:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 12:38:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 12:38:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-22 12:38:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-22 12:38:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-22 12:38:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-22 12:38:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:38:52,705 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-22 12:38:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-22 12:38:52,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:38:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:38:52,875 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:38:52,876 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:38:57,416 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:38:57,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:38:57,435 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-22 12:38:57,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:38:57 BoogieIcfgContainer [2021-12-22 12:38:57,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:38:57,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:38:57,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:38:57,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:38:57,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:38:49" (1/3) ... [2021-12-22 12:38:57,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f6ab5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:38:57, skipping insertion in model container [2021-12-22 12:38:57,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:38:51" (2/3) ... [2021-12-22 12:38:57,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f6ab5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:38:57, skipping insertion in model container [2021-12-22 12:38:57,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:38:57" (3/3) ... [2021-12-22 12:38:57,444 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.02.cil-2.c [2021-12-22 12:38:57,448 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:38:57,448 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:38:57,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:38:57,485 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 [2021-12-22 12:38:57,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:38:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 12:38:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:38:57,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:38:57,530 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, 1] [2021-12-22 12:38:57,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:38:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:38:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2021-12-22 12:38:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:38:57,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636749145] [2021-12-22 12:38:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:38:57,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:38:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:57,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:38:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:57,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:38:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:57,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:38:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:57,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:38:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:57,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:38:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:38:57,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:38:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636749145] [2021-12-22 12:38:57,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636749145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:38:57,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:38:57,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:38:57,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576785731] [2021-12-22 12:38:57,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:38:57,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:38:57,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:38:57,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:38:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:38:57,909 INFO L87 Difference]: Start difference. First operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:38:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:38:58,535 INFO L93 Difference]: Finished difference Result 4824 states and 8887 transitions. [2021-12-22 12:38:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:38:58,537 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-22 12:38:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:38:58,562 INFO L225 Difference]: With dead ends: 4824 [2021-12-22 12:38:58,563 INFO L226 Difference]: Without dead ends: 2441 [2021-12-22 12:38:58,572 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 [2021-12-22 12:38:58,575 INFO L933 BasicCegarLoop]: 4249 mSDtfsCounter, 4444 mSDsluCounter, 12475 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 16724 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:38:58,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4453 Valid, 16724 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:38:58,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-12-22 12:38:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2376. [2021-12-22 12:38:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8340480274442539) internal successors, (4277), 2336 states have internal predecessors, (4277), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-22 12:38:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4336 transitions. [2021-12-22 12:38:58,685 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4336 transitions. Word has length 69 [2021-12-22 12:38:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:38:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4336 transitions. [2021-12-22 12:38:58,686 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:38:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4336 transitions. [2021-12-22 12:38:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:38:58,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:38:58,691 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, 1] [2021-12-22 12:38:58,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:38:58,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:38:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:38:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1960277912, now seen corresponding path program 1 times [2021-12-22 12:38:58,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:38:58,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230043314] [2021-12-22 12:38:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:38:58,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:38:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:58,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:38:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:58,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:38:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:58,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:38:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:58,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:38:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:58,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:38:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:38:58,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:38:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230043314] [2021-12-22 12:38:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230043314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:38:58,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:38:58,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:38:58,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000091533] [2021-12-22 12:38:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:38:58,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:38:58,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:38:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:38:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:38:58,794 INFO L87 Difference]: Start difference. First operand 2376 states and 4336 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:38:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:38:59,518 INFO L93 Difference]: Finished difference Result 2838 states and 5030 transitions. [2021-12-22 12:38:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:38:59,519 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-22 12:38:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:38:59,528 INFO L225 Difference]: With dead ends: 2838 [2021-12-22 12:38:59,529 INFO L226 Difference]: Without dead ends: 2593 [2021-12-22 12:38:59,530 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 [2021-12-22 12:38:59,531 INFO L933 BasicCegarLoop]: 4270 mSDtfsCounter, 4365 mSDsluCounter, 16547 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20817 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:38:59,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4374 Valid, 20817 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:38:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2021-12-22 12:38:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2490. [2021-12-22 12:38:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2428 states have (on average 1.82001647446458) internal successors, (4419), 2433 states have internal predecessors, (4419), 40 states have call successors, (40), 19 states have call predecessors, (40), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-22 12:38:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4502 transitions. [2021-12-22 12:38:59,585 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4502 transitions. Word has length 69 [2021-12-22 12:38:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:38:59,585 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 4502 transitions. [2021-12-22 12:38:59,585 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:38:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4502 transitions. [2021-12-22 12:38:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:38:59,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:38:59,588 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, 1] [2021-12-22 12:38:59,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:38:59,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:38:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:38:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -573492502, now seen corresponding path program 1 times [2021-12-22 12:38:59,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:38:59,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761749320] [2021-12-22 12:38:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:38:59,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:38:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:59,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:38:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:59,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:38:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:59,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:38:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:38:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:38:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:38:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:38:59,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:38:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761749320] [2021-12-22 12:38:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761749320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:38:59,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:38:59,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:38:59,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559343782] [2021-12-22 12:38:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:38:59,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:38:59,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:38:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:38:59,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:38:59,710 INFO L87 Difference]: Start difference. First operand 2490 states and 4502 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:00,358 INFO L93 Difference]: Finished difference Result 3239 states and 5624 transitions. [2021-12-22 12:39:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:39:00,358 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-22 12:39:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:00,368 INFO L225 Difference]: With dead ends: 3239 [2021-12-22 12:39:00,368 INFO L226 Difference]: Without dead ends: 2880 [2021-12-22 12:39:00,370 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 [2021-12-22 12:39:00,371 INFO L933 BasicCegarLoop]: 4181 mSDtfsCounter, 4399 mSDsluCounter, 16326 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4408 SdHoareTripleChecker+Valid, 20507 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:39:00,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4408 Valid, 20507 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:39:00,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-12-22 12:39:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2719. [2021-12-22 12:39:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2621 states have (on average 1.794734834032812) internal successors, (4704), 2628 states have internal predecessors, (4704), 62 states have call successors, (62), 31 states have call predecessors, (62), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-22 12:39:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4839 transitions. [2021-12-22 12:39:00,428 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4839 transitions. Word has length 69 [2021-12-22 12:39:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:00,428 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 4839 transitions. [2021-12-22 12:39:00,428 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4839 transitions. [2021-12-22 12:39:00,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:39:00,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:00,430 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, 1] [2021-12-22 12:39:00,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:39:00,431 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:00,431 INFO L85 PathProgramCache]: Analyzing trace with hash 302526504, now seen corresponding path program 1 times [2021-12-22 12:39:00,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:00,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062203727] [2021-12-22 12:39:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:00,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:00,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:00,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:00,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:00,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:00,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:39:00,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:00,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062203727] [2021-12-22 12:39:00,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062203727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:00,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:39:00,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:39:00,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753071599] [2021-12-22 12:39:00,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:00,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:39:00,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:39:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:39:00,525 INFO L87 Difference]: Start difference. First operand 2719 states and 4839 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:01,375 INFO L93 Difference]: Finished difference Result 4113 states and 6915 transitions. [2021-12-22 12:39:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:39:01,375 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-22 12:39:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:01,387 INFO L225 Difference]: With dead ends: 4113 [2021-12-22 12:39:01,387 INFO L226 Difference]: Without dead ends: 3525 [2021-12-22 12:39:01,391 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 [2021-12-22 12:39:01,396 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 4371 mSDsluCounter, 16532 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4379 SdHoareTripleChecker+Valid, 20811 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:39:01,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4379 Valid, 20811 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:39:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2021-12-22 12:39:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 3131. [2021-12-22 12:39:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2965 states have (on average 1.7551433389544688) internal successors, (5204), 2976 states have internal predecessors, (5204), 102 states have call successors, (102), 55 states have call predecessors, (102), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-22 12:39:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5441 transitions. [2021-12-22 12:39:01,499 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5441 transitions. Word has length 69 [2021-12-22 12:39:01,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:01,503 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 5441 transitions. [2021-12-22 12:39:01,504 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5441 transitions. [2021-12-22 12:39:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:39:01,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:01,506 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, 1] [2021-12-22 12:39:01,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:39:01,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1840866534, now seen corresponding path program 1 times [2021-12-22 12:39:01,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:01,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951113945] [2021-12-22 12:39:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:01,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:01,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:01,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:01,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:01,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:39:01,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951113945] [2021-12-22 12:39:01,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951113945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:01,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:39:01,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:39:01,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26573833] [2021-12-22 12:39:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:01,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:39:01,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:39:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:39:01,597 INFO L87 Difference]: Start difference. First operand 3131 states and 5441 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:02,278 INFO L93 Difference]: Finished difference Result 5511 states and 8955 transitions. [2021-12-22 12:39:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:39:02,278 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-22 12:39:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:02,293 INFO L225 Difference]: With dead ends: 5511 [2021-12-22 12:39:02,294 INFO L226 Difference]: Without dead ends: 4511 [2021-12-22 12:39:02,297 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 [2021-12-22 12:39:02,298 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4376 mSDsluCounter, 16535 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4388 SdHoareTripleChecker+Valid, 20783 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:39:02,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4388 Valid, 20783 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:39:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-12-22 12:39:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3988. [2021-12-22 12:39:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3690 states have (on average 1.7002710027100272) internal successors, (6274), 3709 states have internal predecessors, (6274), 178 states have call successors, (178), 103 states have call predecessors, (178), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-22 12:39:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 6725 transitions. [2021-12-22 12:39:02,388 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 6725 transitions. Word has length 69 [2021-12-22 12:39:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:02,388 INFO L470 AbstractCegarLoop]: Abstraction has 3988 states and 6725 transitions. [2021-12-22 12:39:02,388 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 6725 transitions. [2021-12-22 12:39:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:39:02,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:02,390 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, 1] [2021-12-22 12:39:02,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:39:02,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:02,391 INFO L85 PathProgramCache]: Analyzing trace with hash -187719576, now seen corresponding path program 1 times [2021-12-22 12:39:02,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:02,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431989334] [2021-12-22 12:39:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:02,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:02,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:02,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:02,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:02,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:39:02,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:02,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431989334] [2021-12-22 12:39:02,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431989334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:02,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:39:02,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:39:02,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979340660] [2021-12-22 12:39:02,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:02,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:39:02,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:39:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:39:02,455 INFO L87 Difference]: Start difference. First operand 3988 states and 6725 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:03,033 INFO L93 Difference]: Finished difference Result 7372 states and 11760 transitions. [2021-12-22 12:39:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:39:03,033 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-22 12:39:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:03,052 INFO L225 Difference]: With dead ends: 7372 [2021-12-22 12:39:03,053 INFO L226 Difference]: Without dead ends: 5516 [2021-12-22 12:39:03,059 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 [2021-12-22 12:39:03,060 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4499 mSDsluCounter, 12284 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4524 SdHoareTripleChecker+Valid, 16596 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:39:03,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4524 Valid, 16596 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:39:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-12-22 12:39:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4929. [2021-12-22 12:39:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4473 states have (on average 1.6492287055667338) internal successors, (7377), 4509 states have internal predecessors, (7377), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-22 12:39:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 8048 transitions. [2021-12-22 12:39:03,179 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 8048 transitions. Word has length 69 [2021-12-22 12:39:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:03,180 INFO L470 AbstractCegarLoop]: Abstraction has 4929 states and 8048 transitions. [2021-12-22 12:39:03,180 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:39:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 8048 transitions. [2021-12-22 12:39:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 12:39:03,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:03,186 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, 1] [2021-12-22 12:39:03,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:39:03,186 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash 770021099, now seen corresponding path program 1 times [2021-12-22 12:39:03,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:03,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084621823] [2021-12-22 12:39:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:03,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:39:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:39:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:39:03,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084621823] [2021-12-22 12:39:03,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084621823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:03,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723539334] [2021-12-22 12:39:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:03,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:03,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:03,304 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) [2021-12-22 12:39:03,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:39:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:03,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:39:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 12:39:03,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:03,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723539334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:03,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:03,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:39:03,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998896465] [2021-12-22 12:39:03,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:03,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:03,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:03,575 INFO L87 Difference]: Start difference. First operand 4929 states and 8048 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:39:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:03,765 INFO L93 Difference]: Finished difference Result 10380 states and 16066 transitions. [2021-12-22 12:39:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:03,766 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-12-22 12:39:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:03,791 INFO L225 Difference]: With dead ends: 10380 [2021-12-22 12:39:03,791 INFO L226 Difference]: Without dead ends: 7583 [2021-12-22 12:39:03,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:03,801 INFO L933 BasicCegarLoop]: 4162 mSDtfsCounter, 4110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4333 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 [2021-12-22 12:39:03,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 4333 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2021-12-22 12:39:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 7527. [2021-12-22 12:39:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 6657 states have (on average 1.5841970857743728) internal successors, (10546), 6726 states have internal predecessors, (10546), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-22 12:39:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 11803 transitions. [2021-12-22 12:39:03,996 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 11803 transitions. Word has length 111 [2021-12-22 12:39:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:03,996 INFO L470 AbstractCegarLoop]: Abstraction has 7527 states and 11803 transitions. [2021-12-22 12:39:03,997 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:39:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 11803 transitions. [2021-12-22 12:39:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 12:39:04,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:04,006 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, 1] [2021-12-22 12:39:04,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:04,220 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 [2021-12-22 12:39:04,220 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash -122535733, now seen corresponding path program 1 times [2021-12-22 12:39:04,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:04,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958624277] [2021-12-22 12:39:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:04,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:39:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:39:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:39:04,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958624277] [2021-12-22 12:39:04,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958624277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810925430] [2021-12-22 12:39:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:04,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:04,311 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) [2021-12-22 12:39:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:39:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:39:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:39:04,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:04,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810925430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:04,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:04,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:04,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606822761] [2021-12-22 12:39:04,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:04,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:04,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:04,504 INFO L87 Difference]: Start difference. First operand 7527 states and 11803 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:39:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:04,728 INFO L93 Difference]: Finished difference Result 17935 states and 27159 transitions. [2021-12-22 12:39:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:04,728 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), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2021-12-22 12:39:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:04,778 INFO L225 Difference]: With dead ends: 17935 [2021-12-22 12:39:04,779 INFO L226 Difference]: Without dead ends: 12541 [2021-12-22 12:39:04,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:04,795 INFO L933 BasicCegarLoop]: 4311 mSDtfsCounter, 154 mSDsluCounter, 4150 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8461 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 [2021-12-22 12:39:04,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8461 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2021-12-22 12:39:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 12541. [2021-12-22 12:39:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 10858 states have (on average 1.5209983422361393) internal successors, (16515), 10976 states have internal predecessors, (16515), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-22 12:39:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 19088 transitions. [2021-12-22 12:39:05,267 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 19088 transitions. Word has length 111 [2021-12-22 12:39:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:05,267 INFO L470 AbstractCegarLoop]: Abstraction has 12541 states and 19088 transitions. [2021-12-22 12:39:05,267 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), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:39:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 19088 transitions. [2021-12-22 12:39:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-22 12:39:05,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:05,291 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, 1] [2021-12-22 12:39:05,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:05,495 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 [2021-12-22 12:39:05,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash 327119452, now seen corresponding path program 1 times [2021-12-22 12:39:05,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:05,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024360084] [2021-12-22 12:39:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:05,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:39:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:39:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 12:39:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 12:39:05,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024360084] [2021-12-22 12:39:05,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024360084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327256302] [2021-12-22 12:39:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:05,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:05,596 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) [2021-12-22 12:39:05,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:39:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:39:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:39:05,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:05,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327256302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:05,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:05,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:39:05,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615432747] [2021-12-22 12:39:05,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:05,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:05,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:05,912 INFO L87 Difference]: Start difference. First operand 12541 states and 19088 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:39:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:06,490 INFO L93 Difference]: Finished difference Result 32917 states and 49009 transitions. [2021-12-22 12:39:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:06,491 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-12-22 12:39:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:06,560 INFO L225 Difference]: With dead ends: 32917 [2021-12-22 12:39:06,561 INFO L226 Difference]: Without dead ends: 22513 [2021-12-22 12:39:06,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:06,598 INFO L933 BasicCegarLoop]: 4183 mSDtfsCounter, 4068 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 4354 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 [2021-12-22 12:39:06,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4068 Valid, 4354 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22513 states. [2021-12-22 12:39:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22513 to 22301. [2021-12-22 12:39:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22301 states, 19038 states have (on average 1.4810904506775922) internal successors, (28197), 19270 states have internal predecessors, (28197), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-22 12:39:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22301 states to 22301 states and 33106 transitions. [2021-12-22 12:39:07,347 INFO L78 Accepts]: Start accepts. Automaton has 22301 states and 33106 transitions. Word has length 143 [2021-12-22 12:39:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:07,348 INFO L470 AbstractCegarLoop]: Abstraction has 22301 states and 33106 transitions. [2021-12-22 12:39:07,348 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:39:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 22301 states and 33106 transitions. [2021-12-22 12:39:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:39:07,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:07,391 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] [2021-12-22 12:39:07,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:07,603 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 [2021-12-22 12:39:07,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:07,604 INFO L85 PathProgramCache]: Analyzing trace with hash 382011958, now seen corresponding path program 1 times [2021-12-22 12:39:07,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:07,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634870911] [2021-12-22 12:39:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:07,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 12:39:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 12:39:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:39:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 12:39:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 12:39:07,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:07,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634870911] [2021-12-22 12:39:07,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634870911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:07,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845774143] [2021-12-22 12:39:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:07,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:07,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:07,701 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) [2021-12-22 12:39:07,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 12:39:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:39:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 12:39:08,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:08,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845774143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:08,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:08,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:08,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190460777] [2021-12-22 12:39:08,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:08,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:08,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:08,007 INFO L87 Difference]: Start difference. First operand 22301 states and 33106 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, (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) [2021-12-22 12:39:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:08,629 INFO L93 Difference]: Finished difference Result 44821 states and 66508 transitions. [2021-12-22 12:39:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:08,630 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, (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 [2021-12-22 12:39:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:08,693 INFO L225 Difference]: With dead ends: 44821 [2021-12-22 12:39:08,694 INFO L226 Difference]: Without dead ends: 24655 [2021-12-22 12:39:08,729 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 [2021-12-22 12:39:08,730 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4087 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4183 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 [2021-12-22 12:39:08,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4183 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24655 states. [2021-12-22 12:39:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24655 to 24655. [2021-12-22 12:39:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 21180 states have (on average 1.4241265344664777) internal successors, (30163), 21412 states have internal predecessors, (30163), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-22 12:39:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 35194 transitions. [2021-12-22 12:39:09,432 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 35194 transitions. Word has length 160 [2021-12-22 12:39:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:09,433 INFO L470 AbstractCegarLoop]: Abstraction has 24655 states and 35194 transitions. [2021-12-22 12:39:09,433 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, (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) [2021-12-22 12:39:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 35194 transitions. [2021-12-22 12:39:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:39:09,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:09,474 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, 1] [2021-12-22 12:39:09,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 12:39:09,687 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 [2021-12-22 12:39:09,687 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:09,688 INFO L85 PathProgramCache]: Analyzing trace with hash 228383827, now seen corresponding path program 1 times [2021-12-22 12:39:09,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:09,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040652840] [2021-12-22 12:39:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:09,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 12:39:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 12:39:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:39:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 12:39:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:39:09,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:09,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040652840] [2021-12-22 12:39:09,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040652840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:09,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966566661] [2021-12-22 12:39:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:09,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:09,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:09,779 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) [2021-12-22 12:39:09,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 12:39:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:39:09,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 12:39:10,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:10,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966566661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:10,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:10,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:10,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851140775] [2021-12-22 12:39:10,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:10,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:10,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:10,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:10,083 INFO L87 Difference]: Start difference. First operand 24655 states and 35194 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:39:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:10,775 INFO L93 Difference]: Finished difference Result 41688 states and 58732 transitions. [2021-12-22 12:39:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:10,776 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-22 12:39:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:10,851 INFO L225 Difference]: With dead ends: 41688 [2021-12-22 12:39:10,851 INFO L226 Difference]: Without dead ends: 26195 [2021-12-22 12:39:10,887 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 [2021-12-22 12:39:10,887 INFO L933 BasicCegarLoop]: 4171 mSDtfsCounter, 4088 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4349 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 [2021-12-22 12:39:10,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4349 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26195 states. [2021-12-22 12:39:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26195 to 26055. [2021-12-22 12:39:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26055 states, 22468 states have (on average 1.3989229125867901) internal successors, (31431), 22700 states have internal predecessors, (31431), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-22 12:39:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26055 states to 26055 states and 36594 transitions. [2021-12-22 12:39:11,855 INFO L78 Accepts]: Start accepts. Automaton has 26055 states and 36594 transitions. Word has length 160 [2021-12-22 12:39:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:11,856 INFO L470 AbstractCegarLoop]: Abstraction has 26055 states and 36594 transitions. [2021-12-22 12:39:11,856 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:39:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 26055 states and 36594 transitions. [2021-12-22 12:39:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:39:11,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:11,893 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, 1] [2021-12-22 12:39:11,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:12,107 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 [2021-12-22 12:39:12,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:12,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1570525413, now seen corresponding path program 1 times [2021-12-22 12:39:12,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:12,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035874781] [2021-12-22 12:39:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:12,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:39:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 12:39:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 12:39:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:39:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:39:12,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:12,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035874781] [2021-12-22 12:39:12,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035874781] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:12,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992311813] [2021-12-22 12:39:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:12,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:12,207 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) [2021-12-22 12:39:12,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 12:39:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:39:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 12:39:12,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:12,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992311813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:12,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:12,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:12,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537208916] [2021-12-22 12:39:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:12,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:12,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:12,465 INFO L87 Difference]: Start difference. First operand 26055 states and 36594 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, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:39:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:13,886 INFO L93 Difference]: Finished difference Result 72665 states and 101108 transitions. [2021-12-22 12:39:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:13,887 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, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-22 12:39:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:14,012 INFO L225 Difference]: With dead ends: 72665 [2021-12-22 12:39:14,012 INFO L226 Difference]: Without dead ends: 48749 [2021-12-22 12:39:14,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:14,063 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 163 mSDsluCounter, 4147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 8467 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 [2021-12-22 12:39:14,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 8467 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48749 states. [2021-12-22 12:39:15,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48749 to 48705. [2021-12-22 12:39:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48705 states, 41704 states have (on average 1.3657442931133703) internal successors, (56957), 42166 states have internal predecessors, (56957), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2021-12-22 12:39:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48705 states to 48705 states and 67866 transitions. [2021-12-22 12:39:15,760 INFO L78 Accepts]: Start accepts. Automaton has 48705 states and 67866 transitions. Word has length 161 [2021-12-22 12:39:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:15,761 INFO L470 AbstractCegarLoop]: Abstraction has 48705 states and 67866 transitions. [2021-12-22 12:39:15,761 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, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:39:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 48705 states and 67866 transitions. [2021-12-22 12:39:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:39:15,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:15,837 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, 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, 1] [2021-12-22 12:39:15,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 12:39:16,051 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 [2021-12-22 12:39:16,052 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash -948353227, now seen corresponding path program 1 times [2021-12-22 12:39:16,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082595724] [2021-12-22 12:39:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:16,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:39:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 12:39:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:39:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:39:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 12:39:16,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:16,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082595724] [2021-12-22 12:39:16,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082595724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:16,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234707780] [2021-12-22 12:39:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:16,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:16,146 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) [2021-12-22 12:39:16,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 12:39:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:39:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 12:39:16,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:16,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234707780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:16,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:16,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:16,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037989011] [2021-12-22 12:39:16,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:16,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:16,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:16,518 INFO L87 Difference]: Start difference. First operand 48705 states and 67866 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-22 12:39:17,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:17,743 INFO L93 Difference]: Finished difference Result 79069 states and 111521 transitions. [2021-12-22 12:39:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 161 [2021-12-22 12:39:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:17,848 INFO L225 Difference]: With dead ends: 79069 [2021-12-22 12:39:17,848 INFO L226 Difference]: Without dead ends: 41521 [2021-12-22 12:39:17,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:17,914 INFO L933 BasicCegarLoop]: 4148 mSDtfsCounter, 4082 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4082 SdHoareTripleChecker+Valid, 4181 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 [2021-12-22 12:39:17,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4082 Valid, 4181 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41521 states. [2021-12-22 12:39:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41521 to 30305. [2021-12-22 12:39:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30305 states, 26128 states have (on average 1.3429654011022658) internal successors, (35089), 26370 states have internal predecessors, (35089), 2255 states have call successors, (2255), 1729 states have call predecessors, (2255), 1920 states have return successors, (3778), 2237 states have call predecessors, (3778), 2253 states have call successors, (3778) [2021-12-22 12:39:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30305 states to 30305 states and 41122 transitions. [2021-12-22 12:39:19,517 INFO L78 Accepts]: Start accepts. Automaton has 30305 states and 41122 transitions. Word has length 161 [2021-12-22 12:39:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:19,518 INFO L470 AbstractCegarLoop]: Abstraction has 30305 states and 41122 transitions. [2021-12-22 12:39:19,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-22 12:39:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 30305 states and 41122 transitions. [2021-12-22 12:39:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:39:19,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:19,552 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, 1] [2021-12-22 12:39:19,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:19,753 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 [2021-12-22 12:39:19,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash -192882952, now seen corresponding path program 1 times [2021-12-22 12:39:19,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:19,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219418338] [2021-12-22 12:39:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:19,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:39:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 12:39:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:39:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:39:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 12:39:19,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:19,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219418338] [2021-12-22 12:39:19,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219418338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:19,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473150375] [2021-12-22 12:39:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:19,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:19,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:19,856 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) [2021-12-22 12:39:19,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 12:39:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:39:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:39:20,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:20,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473150375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:20,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:20,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:20,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919146430] [2021-12-22 12:39:20,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:20,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:20,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:20,121 INFO L87 Difference]: Start difference. First operand 30305 states and 41122 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:39:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:21,878 INFO L93 Difference]: Finished difference Result 82213 states and 110894 transitions. [2021-12-22 12:39:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-22 12:39:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:22,018 INFO L225 Difference]: With dead ends: 82213 [2021-12-22 12:39:22,019 INFO L226 Difference]: Without dead ends: 54057 [2021-12-22 12:39:22,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:22,068 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 150 mSDsluCounter, 4144 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 8458 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 [2021-12-22 12:39:22,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 8458 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54057 states. [2021-12-22 12:39:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54057 to 54053. [2021-12-22 12:39:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3125974363415902) internal successors, (60621), 46666 states have internal predecessors, (60621), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-22 12:39:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 73088 transitions. [2021-12-22 12:39:24,415 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 73088 transitions. Word has length 161 [2021-12-22 12:39:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:24,416 INFO L470 AbstractCegarLoop]: Abstraction has 54053 states and 73088 transitions. [2021-12-22 12:39:24,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:39:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 73088 transitions. [2021-12-22 12:39:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:39:24,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:24,472 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, 1] [2021-12-22 12:39:24,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:24,687 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 [2021-12-22 12:39:24,687 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1491732838, now seen corresponding path program 1 times [2021-12-22 12:39:24,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:24,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847544693] [2021-12-22 12:39:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:24,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:39:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:39:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 12:39:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:39:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 12:39:24,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:24,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847544693] [2021-12-22 12:39:24,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847544693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552392008] [2021-12-22 12:39:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:24,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:24,800 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) [2021-12-22 12:39:24,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 12:39:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:24,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:39:24,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 12:39:25,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:25,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552392008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:25,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:25,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:25,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361996038] [2021-12-22 12:39:25,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:25,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:25,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:25,088 INFO L87 Difference]: Start difference. First operand 54053 states and 73088 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:39:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:26,977 INFO L93 Difference]: Finished difference Result 95015 states and 127828 transitions. [2021-12-22 12:39:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:26,977 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-22 12:39:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:27,126 INFO L225 Difference]: With dead ends: 95015 [2021-12-22 12:39:27,127 INFO L226 Difference]: Without dead ends: 54897 [2021-12-22 12:39:27,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:27,187 INFO L933 BasicCegarLoop]: 4186 mSDtfsCounter, 4108 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4357 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:39:27,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4108 Valid, 4357 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54897 states. [2021-12-22 12:39:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54897 to 54053. [2021-12-22 12:39:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3048025290143772) internal successors, (60261), 46666 states have internal predecessors, (60261), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-22 12:39:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 72728 transitions. [2021-12-22 12:39:29,514 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 72728 transitions. Word has length 161 [2021-12-22 12:39:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:29,514 INFO L470 AbstractCegarLoop]: Abstraction has 54053 states and 72728 transitions. [2021-12-22 12:39:29,514 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:39:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 72728 transitions. [2021-12-22 12:39:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:39:29,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:29,568 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, 1] [2021-12-22 12:39:29,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:29,783 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,SelfDestructingSolverStorable14 [2021-12-22 12:39:29,784 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash -251057197, now seen corresponding path program 1 times [2021-12-22 12:39:29,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:29,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94823211] [2021-12-22 12:39:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:29,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:39:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:39:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:39:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:39:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:39:29,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:29,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94823211] [2021-12-22 12:39:29,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94823211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:39:29,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267138753] [2021-12-22 12:39:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:29,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:39:29,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:39:29,873 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) [2021-12-22 12:39:29,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 12:39:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:39:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:39:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 12:39:30,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:39:30,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267138753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:30,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:39:30,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:39:30,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043726441] [2021-12-22 12:39:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:30,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:39:30,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:39:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:30,131 INFO L87 Difference]: Start difference. First operand 54053 states and 72728 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:39:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:31,893 INFO L93 Difference]: Finished difference Result 94725 states and 126938 transitions. [2021-12-22 12:39:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:39:31,894 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-22 12:39:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:32,039 INFO L225 Difference]: With dead ends: 94725 [2021-12-22 12:39:32,039 INFO L226 Difference]: Without dead ends: 55449 [2021-12-22 12:39:32,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:39:32,102 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4107 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4373 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:39:32,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 4373 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:39:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55449 states. [2021-12-22 12:39:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55449 to 53933. [2021-12-22 12:39:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53933 states, 46064 states have (on average 1.2977813476901703) internal successors, (59781), 46546 states have internal predecessors, (59781), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-22 12:39:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53933 states to 53933 states and 72248 transitions. [2021-12-22 12:39:34,508 INFO L78 Accepts]: Start accepts. Automaton has 53933 states and 72248 transitions. Word has length 161 [2021-12-22 12:39:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:34,509 INFO L470 AbstractCegarLoop]: Abstraction has 53933 states and 72248 transitions. [2021-12-22 12:39:34,509 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:39:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 53933 states and 72248 transitions. [2021-12-22 12:39:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:39:34,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:34,559 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, 1] [2021-12-22 12:39:34,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 12:39:34,759 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,SelfDestructingSolverStorable15 [2021-12-22 12:39:34,759 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:34,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2084105626, now seen corresponding path program 1 times [2021-12-22 12:39:34,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:34,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496451185] [2021-12-22 12:39:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:34,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:39:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:39:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 12:39:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:39:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-22 12:39:34,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:34,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496451185] [2021-12-22 12:39:34,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496451185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:34,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:39:34,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:39:34,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694528999] [2021-12-22 12:39:34,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:34,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:39:34,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:39:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:39:34,853 INFO L87 Difference]: Start difference. First operand 53933 states and 72248 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, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 12:39:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:39:36,992 INFO L93 Difference]: Finished difference Result 103313 states and 136251 transitions. [2021-12-22 12:39:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:39:36,993 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, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-12-22 12:39:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:39:37,143 INFO L225 Difference]: With dead ends: 103313 [2021-12-22 12:39:37,143 INFO L226 Difference]: Without dead ends: 51525 [2021-12-22 12:39:37,220 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 [2021-12-22 12:39:37,220 INFO L933 BasicCegarLoop]: 4148 mSDtfsCounter, 296 mSDsluCounter, 12026 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 16174 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:39:37,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 16174 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:39:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51525 states. [2021-12-22 12:39:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51525 to 48807. [2021-12-22 12:39:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48807 states, 42022 states have (on average 1.3009138070534483) internal successors, (54667), 42916 states have internal predecessors, (54667), 3255 states have call successors, (3255), 2473 states have call predecessors, (3255), 3528 states have return successors, (6773), 3449 states have call predecessors, (6773), 3253 states have call successors, (6773) [2021-12-22 12:39:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48807 states to 48807 states and 64695 transitions. [2021-12-22 12:39:39,747 INFO L78 Accepts]: Start accepts. Automaton has 48807 states and 64695 transitions. Word has length 161 [2021-12-22 12:39:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:39:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 48807 states and 64695 transitions. [2021-12-22 12:39:39,748 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, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 12:39:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 48807 states and 64695 transitions. [2021-12-22 12:39:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:39:39,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:39:39,780 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, 1] [2021-12-22 12:39:39,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 12:39:39,780 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:39:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:39:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 641108433, now seen corresponding path program 1 times [2021-12-22 12:39:39,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:39:39,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135089450] [2021-12-22 12:39:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:39:39,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:39:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:39:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:39:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:39:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:39:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:39:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:39:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:39:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:39:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:39:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:39:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:39:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 12:39:39,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:39:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135089450] [2021-12-22 12:39:39,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135089450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:39:39,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:39:39,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:39:39,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969031553] [2021-12-22 12:39:39,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:39:39,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:39:39,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:39:39,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:39:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:39:39,830 INFO L87 Difference]: Start difference. First operand 48807 states and 64695 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, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)