./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label40+token_ring.01.cil-1.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_label40+token_ring.01.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ea3f29ba9098b2aba97edb9cb7f70305173955e39ba1f1f997318892591c82e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:29:48,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:29:48,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:29:48,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:29:48,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:29:48,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:29:48,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:29:48,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:29:48,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:29:48,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:29:48,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:29:48,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:29:48,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:29:48,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:29:48,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:29:48,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:29:48,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:29:48,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:29:48,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:29:48,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:29:48,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:29:48,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:29:48,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:29:48,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:29:48,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:29:48,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:29:48,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:29:48,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:29:48,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:29:48,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:29:48,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:29:48,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:29:48,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:29:48,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:29:48,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:29:48,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:29:48,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:29:48,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:29:48,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:29:48,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:29:48,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:29:48,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:29:48,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:29:48,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:29:48,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:29:48,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:29:48,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:29:48,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:29:48,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:29:48,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:29:48,730 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:29:48,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:29:48,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:29:48,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:29:48,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:29:48,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:29:48,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:29:48,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:29:48,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:29:48,733 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:29:48,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:29:48,733 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:29:48,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:29:48,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:29:48,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:29:48,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:29:48,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:29:48,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:29:48,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:29:48,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:29:48,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:29:48,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:29:48,735 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:29:48,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:29:48,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:29:48,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:29:48,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ea3f29ba9098b2aba97edb9cb7f70305173955e39ba1f1f997318892591c82e [2021-12-22 12:29:49,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:29:49,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:29:49,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:29:49,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:29:49,044 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:29:49,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label40+token_ring.01.cil-1.c [2021-12-22 12:29:49,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdad2baf/1b3a615d20dd4aa2a0330d4ad3139dd7/FLAGdc5221a03 [2021-12-22 12:29:49,966 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:29:49,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.01.cil-1.c [2021-12-22 12:29:50,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdad2baf/1b3a615d20dd4aa2a0330d4ad3139dd7/FLAGdc5221a03 [2021-12-22 12:29:50,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdad2baf/1b3a615d20dd4aa2a0330d4ad3139dd7 [2021-12-22 12:29:50,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:29:50,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:29:50,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:29:50,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:29:50,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:29:50,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:29:50" (1/1) ... [2021-12-22 12:29:50,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d5a8ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:50, skipping insertion in model container [2021-12-22 12:29:50,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:29:50" (1/1) ... [2021-12-22 12:29:50,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:29:50,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:29:52,325 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_label40+token_ring.01.cil-1.c[377069,377082] [2021-12-22 12:29:52,353 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_label40+token_ring.01.cil-1.c[383339,383352] [2021-12-22 12:29:52,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:29:52,502 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:29:53,386 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_label40+token_ring.01.cil-1.c[377069,377082] [2021-12-22 12:29:53,394 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_label40+token_ring.01.cil-1.c[383339,383352] [2021-12-22 12:29:53,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:29:53,472 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:29:53,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53 WrapperNode [2021-12-22 12:29:53,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:29:53,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:29:53,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:29:53,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:29:53,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:53,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,024 INFO L137 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12561 [2021-12-22 12:29:54,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:29:54,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:29:54,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:29:54,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:29:54,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:29:54,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:29:54,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:29:54,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:29:54,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (1/1) ... [2021-12-22 12:29:54,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:29:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:29:54,653 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 12:29:54,683 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 12:29:54,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:29:54,694 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-22 12:29:54,694 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-22 12:29:54,694 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-22 12:29:54,695 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-22 12:29:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 12:29:54,695 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 12:29:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-22 12:29:54,695 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-22 12:29:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-22 12:29:54,695 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-22 12:29:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:29:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-22 12:29:54,696 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-22 12:29:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:29:54,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:29:54,800 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:29:54,802 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:30:00,591 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:30:00,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:30:00,621 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 12:30:00,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:30:00 BoogieIcfgContainer [2021-12-22 12:30:00,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:30:00,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:30:00,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:30:00,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:30:00,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:29:50" (1/3) ... [2021-12-22 12:30:00,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5465b6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:30:00, skipping insertion in model container [2021-12-22 12:30:00,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:29:53" (2/3) ... [2021-12-22 12:30:00,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5465b6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:30:00, skipping insertion in model container [2021-12-22 12:30:00,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:30:00" (3/3) ... [2021-12-22 12:30:00,636 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.01.cil-1.c [2021-12-22 12:30:00,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:30:00,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:30:00,688 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:30:00,694 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 12:30:00,694 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:30:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 12:30:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 12:30:00,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:00,753 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] [2021-12-22 12:30:00,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash -36301034, now seen corresponding path program 1 times [2021-12-22 12:30:00,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54187019] [2021-12-22 12:30:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:00,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:00,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:00,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:01,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:01,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:01,020 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 12:30:01,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:01,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54187019] [2021-12-22 12:30:01,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54187019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:01,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:01,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:30:01,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318111310] [2021-12-22 12:30:01,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:01,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:30:01,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:30:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:30:01,095 INFO L87 Difference]: Start difference. First operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:01,847 INFO L93 Difference]: Finished difference Result 4705 states and 8678 transitions. [2021-12-22 12:30:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:30:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-22 12:30:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:01,902 INFO L225 Difference]: With dead ends: 4705 [2021-12-22 12:30:01,907 INFO L226 Difference]: Without dead ends: 2354 [2021-12-22 12:30:01,919 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 12:30:01,925 INFO L933 BasicCegarLoop]: 4187 mSDtfsCounter, 4313 mSDsluCounter, 12371 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 16558 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:01,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 16558 Invalid, 453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [72 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:30:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-12-22 12:30:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2313. [2021-12-22 12:30:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2273 states have (on average 1.8376594808622966) internal successors, (4177), 2276 states have internal predecessors, (4177), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2021-12-22 12:30:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 4230 transitions. [2021-12-22 12:30:02,089 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 4230 transitions. Word has length 57 [2021-12-22 12:30:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:02,090 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 4230 transitions. [2021-12-22 12:30:02,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 4230 transitions. [2021-12-22 12:30:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 12:30:02,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:02,100 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] [2021-12-22 12:30:02,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:30:02,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -948253030, now seen corresponding path program 1 times [2021-12-22 12:30:02,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416734705] [2021-12-22 12:30:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:02,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:02,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:02,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:02,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:02,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:02,238 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 12:30:02,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:02,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416734705] [2021-12-22 12:30:02,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416734705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:02,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:02,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:30:02,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667876039] [2021-12-22 12:30:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:02,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:30:02,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:30:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:30:02,248 INFO L87 Difference]: Start difference. First operand 2313 states and 4230 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:02,919 INFO L93 Difference]: Finished difference Result 2645 states and 4704 transitions. [2021-12-22 12:30:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:30:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-22 12:30:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:02,932 INFO L225 Difference]: With dead ends: 2645 [2021-12-22 12:30:02,933 INFO L226 Difference]: Without dead ends: 2462 [2021-12-22 12:30:02,935 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 12:30:02,937 INFO L933 BasicCegarLoop]: 4176 mSDtfsCounter, 4231 mSDsluCounter, 16333 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 20509 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:02,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4239 Valid, 20509 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:30:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-12-22 12:30:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2398. [2021-12-22 12:30:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2341 states have (on average 1.8248611704399829) internal successors, (4272), 2345 states have internal predecessors, (4272), 35 states have call successors, (35), 18 states have call predecessors, (35), 20 states have return successors, (40), 36 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-22 12:30:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 4347 transitions. [2021-12-22 12:30:03,008 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 4347 transitions. Word has length 57 [2021-12-22 12:30:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:03,009 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 4347 transitions. [2021-12-22 12:30:03,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 4347 transitions. [2021-12-22 12:30:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 12:30:03,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:03,011 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] [2021-12-22 12:30:03,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:30:03,011 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1297326424, now seen corresponding path program 1 times [2021-12-22 12:30:03,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031476876] [2021-12-22 12:30:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:03,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:03,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:03,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:03,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:03,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:03,099 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 12:30:03,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031476876] [2021-12-22 12:30:03,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031476876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:03,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:03,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:30:03,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766432923] [2021-12-22 12:30:03,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:03,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:30:03,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:30:03,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:30:03,103 INFO L87 Difference]: Start difference. First operand 2398 states and 4347 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:03,827 INFO L93 Difference]: Finished difference Result 2981 states and 5171 transitions. [2021-12-22 12:30:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:30:03,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-22 12:30:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:03,841 INFO L225 Difference]: With dead ends: 2981 [2021-12-22 12:30:03,841 INFO L226 Difference]: Without dead ends: 2713 [2021-12-22 12:30:03,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:30:03,846 INFO L933 BasicCegarLoop]: 4166 mSDtfsCounter, 4285 mSDsluCounter, 16321 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4295 SdHoareTripleChecker+Valid, 20487 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:03,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4295 Valid, 20487 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:30:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-22 12:30:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2563. [2021-12-22 12:30:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2474 states have (on average 1.8023443815683104) internal successors, (4459), 2480 states have internal predecessors, (4459), 53 states have call successors, (53), 30 states have call predecessors, (53), 34 states have return successors, (66), 56 states have call predecessors, (66), 53 states have call successors, (66) [2021-12-22 12:30:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 4578 transitions. [2021-12-22 12:30:04,037 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 4578 transitions. Word has length 57 [2021-12-22 12:30:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:04,038 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 4578 transitions. [2021-12-22 12:30:04,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 4578 transitions. [2021-12-22 12:30:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 12:30:04,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:04,040 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] [2021-12-22 12:30:04,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:30:04,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash 399933146, now seen corresponding path program 1 times [2021-12-22 12:30:04,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:04,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507609362] [2021-12-22 12:30:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:04,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,117 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 12:30:04,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:04,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507609362] [2021-12-22 12:30:04,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507609362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:04,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:04,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:30:04,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300705469] [2021-12-22 12:30:04,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:04,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:30:04,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:04,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:30:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:30:04,124 INFO L87 Difference]: Start difference. First operand 2563 states and 4578 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:04,798 INFO L93 Difference]: Finished difference Result 3503 states and 5902 transitions. [2021-12-22 12:30:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:30:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-22 12:30:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:04,813 INFO L225 Difference]: With dead ends: 3503 [2021-12-22 12:30:04,814 INFO L226 Difference]: Without dead ends: 3070 [2021-12-22 12:30:04,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:30:04,818 INFO L933 BasicCegarLoop]: 4167 mSDtfsCounter, 4228 mSDsluCounter, 16303 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 20470 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:04,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 20470 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:30:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-12-22 12:30:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2862. [2021-12-22 12:30:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2715 states have (on average 1.7661141804788214) internal successors, (4795), 2725 states have internal predecessors, (4795), 85 states have call successors, (85), 52 states have call predecessors, (85), 60 states have return successors, (120), 92 states have call predecessors, (120), 85 states have call successors, (120) [2021-12-22 12:30:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 5000 transitions. [2021-12-22 12:30:04,902 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 5000 transitions. Word has length 57 [2021-12-22 12:30:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:04,902 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 5000 transitions. [2021-12-22 12:30:04,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 5000 transitions. [2021-12-22 12:30:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 12:30:04,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:04,904 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] [2021-12-22 12:30:04,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:30:04,905 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash 648079640, now seen corresponding path program 1 times [2021-12-22 12:30:04,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:04,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496970970] [2021-12-22 12:30:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:04,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:04,971 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 12:30:04,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:04,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496970970] [2021-12-22 12:30:04,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496970970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:04,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:04,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:30:04,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608163227] [2021-12-22 12:30:04,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:04,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:30:04,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:04,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:30:04,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:30:04,974 INFO L87 Difference]: Start difference. First operand 2862 states and 5000 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:05,520 INFO L93 Difference]: Finished difference Result 4199 states and 6894 transitions. [2021-12-22 12:30:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:30:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-22 12:30:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:05,537 INFO L225 Difference]: With dead ends: 4199 [2021-12-22 12:30:05,538 INFO L226 Difference]: Without dead ends: 3468 [2021-12-22 12:30:05,542 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 12:30:05,543 INFO L933 BasicCegarLoop]: 4213 mSDtfsCounter, 4340 mSDsluCounter, 12169 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4363 SdHoareTripleChecker+Valid, 16382 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:05,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4363 Valid, 16382 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:30:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-12-22 12:30:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3263. [2021-12-22 12:30:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3033 states have (on average 1.7213979558193209) internal successors, (5221), 3052 states have internal predecessors, (5221), 134 states have call successors, (134), 82 states have call predecessors, (134), 94 states have return successors, (179), 136 states have call predecessors, (179), 134 states have call successors, (179) [2021-12-22 12:30:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 5534 transitions. [2021-12-22 12:30:05,645 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 5534 transitions. Word has length 57 [2021-12-22 12:30:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:05,646 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 5534 transitions. [2021-12-22 12:30:05,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 12:30:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 5534 transitions. [2021-12-22 12:30:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 12:30:05,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:05,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:05,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:30:05,650 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash 12281189, now seen corresponding path program 1 times [2021-12-22 12:30:05,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:05,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945787400] [2021-12-22 12:30:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:05,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 12:30:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:30:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:30:05,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:05,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945787400] [2021-12-22 12:30:05,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945787400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:05,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901304486] [2021-12-22 12:30:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:05,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:05,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:05,787 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 12:30:05,819 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 12:30:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:30:05,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 12:30:06,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:06,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901304486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:06,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:06,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:30:06,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397089147] [2021-12-22 12:30:06,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:06,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:06,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:30:06,059 INFO L87 Difference]: Start difference. First operand 3263 states and 5534 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:06,163 INFO L93 Difference]: Finished difference Result 5442 states and 8608 transitions. [2021-12-22 12:30:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:06,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-12-22 12:30:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:06,187 INFO L225 Difference]: With dead ends: 5442 [2021-12-22 12:30:06,187 INFO L226 Difference]: Without dead ends: 4311 [2021-12-22 12:30:06,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 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 12:30:06,198 INFO L933 BasicCegarLoop]: 4217 mSDtfsCounter, 114 mSDsluCounter, 4096 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 8313 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 12:30:06,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 8313 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:30:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-12-22 12:30:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 4311. [2021-12-22 12:30:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4311 states, 3872 states have (on average 1.6417871900826446) internal successors, (6357), 3904 states have internal predecessors, (6357), 253 states have call successors, (253), 160 states have call predecessors, (253), 184 states have return successors, (376), 262 states have call predecessors, (376), 253 states have call successors, (376) [2021-12-22 12:30:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 6986 transitions. [2021-12-22 12:30:06,392 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 6986 transitions. Word has length 92 [2021-12-22 12:30:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:06,394 INFO L470 AbstractCegarLoop]: Abstraction has 4311 states and 6986 transitions. [2021-12-22 12:30:06,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 6986 transitions. [2021-12-22 12:30:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 12:30:06,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:06,410 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:30:06,442 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 12:30:06,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 12:30:06,636 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:06,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash -788169551, now seen corresponding path program 1 times [2021-12-22 12:30:06,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:06,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935175647] [2021-12-22 12:30:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:06,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 12:30:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 12:30:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 12:30:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 12:30:06,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935175647] [2021-12-22 12:30:06,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935175647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440172014] [2021-12-22 12:30:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:06,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:06,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:06,836 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 12:30:06,866 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 12:30:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:06,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:30:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 12:30:07,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:07,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440172014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:07,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:07,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:30:07,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590987502] [2021-12-22 12:30:07,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:07,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:07,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:07,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:07,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:30:07,211 INFO L87 Difference]: Start difference. First operand 4311 states and 6986 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:30:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:07,362 INFO L93 Difference]: Finished difference Result 8527 states and 12855 transitions. [2021-12-22 12:30:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 118 [2021-12-22 12:30:07,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:07,396 INFO L225 Difference]: With dead ends: 8527 [2021-12-22 12:30:07,397 INFO L226 Difference]: Without dead ends: 6351 [2021-12-22 12:30:07,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 12:30:07,408 INFO L933 BasicCegarLoop]: 4117 mSDtfsCounter, 4026 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4026 SdHoareTripleChecker+Valid, 4237 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 12:30:07,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4026 Valid, 4237 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:30:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-12-22 12:30:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6293. [2021-12-22 12:30:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 5460 states have (on average 1.5576923076923077) internal successors, (8505), 5521 states have internal predecessors, (8505), 473 states have call successors, (473), 310 states have call predecessors, (473), 358 states have return successors, (688), 477 states have call predecessors, (688), 473 states have call successors, (688) [2021-12-22 12:30:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 9666 transitions. [2021-12-22 12:30:07,628 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 9666 transitions. Word has length 118 [2021-12-22 12:30:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:07,628 INFO L470 AbstractCegarLoop]: Abstraction has 6293 states and 9666 transitions. [2021-12-22 12:30:07,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:30:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 9666 transitions. [2021-12-22 12:30:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 12:30:07,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:07,640 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:30:07,670 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 12:30:07,855 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,SelfDestructingSolverStorable6 [2021-12-22 12:30:07,855 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1080279049, now seen corresponding path program 1 times [2021-12-22 12:30:07,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:07,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980599623] [2021-12-22 12:30:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:07,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 12:30:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:30:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 12:30:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 12:30:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-22 12:30:07,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:07,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980599623] [2021-12-22 12:30:07,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980599623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:07,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325703557] [2021-12-22 12:30:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:07,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:07,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:07,961 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 12:30:07,963 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 12:30:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:30:08,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 12:30:08,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:08,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325703557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:08,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:08,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:30:08,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732944438] [2021-12-22 12:30:08,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:08,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:08,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:30:08,257 INFO L87 Difference]: Start difference. First operand 6293 states and 9666 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:30:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:08,432 INFO L93 Difference]: Finished difference Result 9515 states and 14095 transitions. [2021-12-22 12:30:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:08,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 134 [2021-12-22 12:30:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:08,472 INFO L225 Difference]: With dead ends: 9515 [2021-12-22 12:30:08,472 INFO L226 Difference]: Without dead ends: 6621 [2021-12-22 12:30:08,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 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 12:30:08,485 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4059 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4059 SdHoareTripleChecker+Valid, 4248 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 12:30:08,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4059 Valid, 4248 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:30:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6621 states. [2021-12-22 12:30:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6621 to 6583. [2021-12-22 12:30:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 5718 states have (on average 1.5318293109478838) internal successors, (8759), 5779 states have internal predecessors, (8759), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-22 12:30:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 9958 transitions. [2021-12-22 12:30:08,741 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 9958 transitions. Word has length 134 [2021-12-22 12:30:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:08,741 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 9958 transitions. [2021-12-22 12:30:08,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:30:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 9958 transitions. [2021-12-22 12:30:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-22 12:30:08,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:08,755 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:30:08,783 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 12:30:08,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:08,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash 703612430, now seen corresponding path program 1 times [2021-12-22 12:30:08,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:08,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118312689] [2021-12-22 12:30:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:08,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 12:30:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 12:30:09,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118312689] [2021-12-22 12:30:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118312689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439208217] [2021-12-22 12:30:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:09,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:09,126 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 12:30:09,128 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 12:30:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:30:09,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 12:30:09,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:09,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439208217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:09,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:09,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:30:09,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379960472] [2021-12-22 12:30:09,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:09,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:09,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:09,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:09,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:30:09,424 INFO L87 Difference]: Start difference. First operand 6583 states and 9958 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:30:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:09,632 INFO L93 Difference]: Finished difference Result 8950 states and 13283 transitions. [2021-12-22 12:30:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:09,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2021-12-22 12:30:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:09,654 INFO L225 Difference]: With dead ends: 8950 [2021-12-22 12:30:09,655 INFO L226 Difference]: Without dead ends: 6617 [2021-12-22 12:30:09,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 12:30:09,664 INFO L933 BasicCegarLoop]: 4205 mSDtfsCounter, 99 mSDsluCounter, 4087 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 8292 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:09,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 8292 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:30:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-12-22 12:30:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 6559. [2021-12-22 12:30:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 5694 states have (on average 1.5175623463294696) internal successors, (8641), 5755 states have internal predecessors, (8641), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-22 12:30:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 9840 transitions. [2021-12-22 12:30:09,884 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 9840 transitions. Word has length 135 [2021-12-22 12:30:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:09,885 INFO L470 AbstractCegarLoop]: Abstraction has 6559 states and 9840 transitions. [2021-12-22 12:30:09,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:30:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 9840 transitions. [2021-12-22 12:30:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-22 12:30:09,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:09,896 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:30:09,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 12:30:10,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:10,112 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1285829934, now seen corresponding path program 1 times [2021-12-22 12:30:10,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:10,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144978104] [2021-12-22 12:30:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:10,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 12:30:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 12:30:10,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144978104] [2021-12-22 12:30:10,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144978104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961798444] [2021-12-22 12:30:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:10,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:10,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:10,219 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 12:30:10,221 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 12:30:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:30:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 12:30:10,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:10,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961798444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:10,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:10,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:30:10,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676470754] [2021-12-22 12:30:10,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:10,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:10,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:30:10,492 INFO L87 Difference]: Start difference. First operand 6559 states and 9840 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:30:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:10,643 INFO L93 Difference]: Finished difference Result 9831 states and 14294 transitions. [2021-12-22 12:30:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 135 [2021-12-22 12:30:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:10,662 INFO L225 Difference]: With dead ends: 9831 [2021-12-22 12:30:10,662 INFO L226 Difference]: Without dead ends: 5941 [2021-12-22 12:30:10,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 12:30:10,674 INFO L933 BasicCegarLoop]: 4100 mSDtfsCounter, 4077 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 4124 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:10,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4077 Valid, 4124 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:30:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-12-22 12:30:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 5711. [2021-12-22 12:30:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5012 states have (on average 1.5157621707901037) internal successors, (7597), 5057 states have internal predecessors, (7597), 391 states have call successors, (391), 274 states have call predecessors, (391), 306 states have return successors, (510), 387 states have call predecessors, (510), 391 states have call successors, (510) [2021-12-22 12:30:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 8498 transitions. [2021-12-22 12:30:10,856 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 8498 transitions. Word has length 135 [2021-12-22 12:30:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 5711 states and 8498 transitions. [2021-12-22 12:30:10,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:30:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 8498 transitions. [2021-12-22 12:30:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 12:30:10,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:10,864 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:30:10,888 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 12:30:11,079 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,SelfDestructingSolverStorable9 [2021-12-22 12:30:11,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash -371269117, now seen corresponding path program 1 times [2021-12-22 12:30:11,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:11,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127985269] [2021-12-22 12:30:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:11,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 12:30:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 12:30:11,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:11,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127985269] [2021-12-22 12:30:11,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127985269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:11,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126526703] [2021-12-22 12:30:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:11,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:11,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:11,190 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 12:30:11,191 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 12:30:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:11,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 12:30:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 12:30:11,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:11,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126526703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:11,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:11,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 12:30:11,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883122936] [2021-12-22 12:30:11,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:11,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:30:11,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:30:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 12:30:11,546 INFO L87 Difference]: Start difference. First operand 5711 states and 8498 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:11,803 INFO L93 Difference]: Finished difference Result 7117 states and 10335 transitions. [2021-12-22 12:30:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:30:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-22 12:30:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:11,817 INFO L225 Difference]: With dead ends: 7117 [2021-12-22 12:30:11,817 INFO L226 Difference]: Without dead ends: 4791 [2021-12-22 12:30:11,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 12:30:11,826 INFO L933 BasicCegarLoop]: 4078 mSDtfsCounter, 4094 mSDsluCounter, 8053 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 12131 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:11,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 12131 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:30:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-12-22 12:30:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4779. [2021-12-22 12:30:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4262 states have (on average 1.544580009385265) internal successors, (6583), 4289 states have internal predecessors, (6583), 295 states have call successors, (295), 204 states have call predecessors, (295), 220 states have return successors, (354), 289 states have call predecessors, (354), 295 states have call successors, (354) [2021-12-22 12:30:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 7232 transitions. [2021-12-22 12:30:11,996 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 7232 transitions. Word has length 136 [2021-12-22 12:30:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:11,997 INFO L470 AbstractCegarLoop]: Abstraction has 4779 states and 7232 transitions. [2021-12-22 12:30:11,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 7232 transitions. [2021-12-22 12:30:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 12:30:12,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:12,002 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:30:12,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 12:30:12,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:12,224 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1678411515, now seen corresponding path program 1 times [2021-12-22 12:30:12,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65383400] [2021-12-22 12:30:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:12,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 12:30:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 12:30:12,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65383400] [2021-12-22 12:30:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65383400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125260263] [2021-12-22 12:30:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:12,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:12,392 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 12:30:12,393 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 12:30:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 12:30:12,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 12:30:12,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:12,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125260263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:12,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:12,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 12:30:12,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677222617] [2021-12-22 12:30:12,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:12,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:30:12,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:12,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:30:12,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 12:30:12,731 INFO L87 Difference]: Start difference. First operand 4779 states and 7232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:13,042 INFO L93 Difference]: Finished difference Result 7083 states and 10147 transitions. [2021-12-22 12:30:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:30:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-22 12:30:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:13,056 INFO L225 Difference]: With dead ends: 7083 [2021-12-22 12:30:13,056 INFO L226 Difference]: Without dead ends: 4732 [2021-12-22 12:30:13,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-22 12:30:13,064 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 4115 mSDsluCounter, 8050 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4123 SdHoareTripleChecker+Valid, 12140 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:13,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4123 Valid, 12140 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:30:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-12-22 12:30:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 3773. [2021-12-22 12:30:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 3468 states have (on average 1.6000576701268743) internal successors, (5549), 3483 states have internal predecessors, (5549), 173 states have call successors, (173), 122 states have call predecessors, (173), 130 states have return successors, (203), 169 states have call predecessors, (203), 173 states have call successors, (203) [2021-12-22 12:30:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 5925 transitions. [2021-12-22 12:30:13,216 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 5925 transitions. Word has length 136 [2021-12-22 12:30:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:13,217 INFO L470 AbstractCegarLoop]: Abstraction has 3773 states and 5925 transitions. [2021-12-22 12:30:13,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 5925 transitions. [2021-12-22 12:30:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 12:30:13,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:13,221 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:30:13,251 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 12:30:13,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:13,436 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 219085251, now seen corresponding path program 1 times [2021-12-22 12:30:13,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:13,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693602504] [2021-12-22 12:30:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:13,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 12:30:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 12:30:13,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693602504] [2021-12-22 12:30:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693602504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42338090] [2021-12-22 12:30:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:13,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:13,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:13,564 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 12:30:13,592 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 12:30:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 12:30:13,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-22 12:30:13,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:13,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42338090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:13,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:13,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-22 12:30:13,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009509554] [2021-12-22 12:30:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:13,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:30:13,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:30:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:30:13,882 INFO L87 Difference]: Start difference. First operand 3773 states and 5925 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:14,045 INFO L93 Difference]: Finished difference Result 4900 states and 7289 transitions. [2021-12-22 12:30:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:30:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-22 12:30:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:14,053 INFO L225 Difference]: With dead ends: 4900 [2021-12-22 12:30:14,053 INFO L226 Difference]: Without dead ends: 3258 [2021-12-22 12:30:14,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:30:14,059 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 48 mSDsluCounter, 12279 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 16369 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:14,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 16369 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:30:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-12-22 12:30:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3222. [2021-12-22 12:30:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3024 states have (on average 1.6537698412698412) internal successors, (5001), 3035 states have internal predecessors, (5001), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-22 12:30:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 5232 transitions. [2021-12-22 12:30:14,176 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 5232 transitions. Word has length 136 [2021-12-22 12:30:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:14,176 INFO L470 AbstractCegarLoop]: Abstraction has 3222 states and 5232 transitions. [2021-12-22 12:30:14,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 5232 transitions. [2021-12-22 12:30:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 12:30:14,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:14,179 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:30:14,205 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 12:30:14,402 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,SelfDestructingSolverStorable12 [2021-12-22 12:30:14,403 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 731116351, now seen corresponding path program 1 times [2021-12-22 12:30:14,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:14,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326796860] [2021-12-22 12:30:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:14,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 12:30:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 12:30:14,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:14,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326796860] [2021-12-22 12:30:14,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326796860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:30:14,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790776690] [2021-12-22 12:30:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:14,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:30:14,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:30:14,492 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 12:30:14,493 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 12:30:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:14,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 12:30:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:30:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 12:30:14,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:30:14,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790776690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:14,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:30:14,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-22 12:30:14,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057222470] [2021-12-22 12:30:14,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:14,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:30:14,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:14,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:30:14,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:30:14,792 INFO L87 Difference]: Start difference. First operand 3222 states and 5232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:14,938 INFO L93 Difference]: Finished difference Result 4341 states and 6571 transitions. [2021-12-22 12:30:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:30:14,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-22 12:30:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:14,946 INFO L225 Difference]: With dead ends: 4341 [2021-12-22 12:30:14,946 INFO L226 Difference]: Without dead ends: 3250 [2021-12-22 12:30:14,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:30:14,950 INFO L933 BasicCegarLoop]: 4089 mSDtfsCounter, 10 mSDsluCounter, 12266 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16355 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:14,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16355 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:30:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-12-22 12:30:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3234. [2021-12-22 12:30:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3036 states have (on average 1.6442687747035574) internal successors, (4992), 3047 states have internal predecessors, (4992), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-22 12:30:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 5223 transitions. [2021-12-22 12:30:15,068 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 5223 transitions. Word has length 136 [2021-12-22 12:30:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:15,068 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 5223 transitions. [2021-12-22 12:30:15,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:30:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 5223 transitions. [2021-12-22 12:30:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 12:30:15,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:15,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:15,096 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 12:30:15,287 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,SelfDestructingSolverStorable13 [2021-12-22 12:30:15,287 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash -26178757, now seen corresponding path program 1 times [2021-12-22 12:30:15,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:15,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192372734] [2021-12-22 12:30:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:15,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 12:30:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-22 12:30:15,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192372734] [2021-12-22 12:30:15,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192372734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:15,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:15,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:30:15,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575265998] [2021-12-22 12:30:15,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:15,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:30:15,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:30:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:30:15,401 INFO L87 Difference]: Start difference. First operand 3234 states and 5223 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-22 12:30:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:15,951 INFO L93 Difference]: Finished difference Result 4191 states and 6295 transitions. [2021-12-22 12:30:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 12:30:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 136 [2021-12-22 12:30:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:15,962 INFO L225 Difference]: With dead ends: 4191 [2021-12-22 12:30:15,963 INFO L226 Difference]: Without dead ends: 4189 [2021-12-22 12:30:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-22 12:30:15,966 INFO L933 BasicCegarLoop]: 4160 mSDtfsCounter, 4428 mSDsluCounter, 12164 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4451 SdHoareTripleChecker+Valid, 16324 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:15,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4451 Valid, 16324 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 12:30:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-12-22 12:30:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3610. [2021-12-22 12:30:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3346 states have (on average 1.5971309025702332) internal successors, (5344), 3361 states have internal predecessors, (5344), 144 states have call successors, (144), 103 states have call predecessors, (144), 118 states have return successors, (163), 146 states have call predecessors, (163), 144 states have call successors, (163) [2021-12-22 12:30:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5651 transitions. [2021-12-22 12:30:16,194 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5651 transitions. Word has length 136 [2021-12-22 12:30:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:16,194 INFO L470 AbstractCegarLoop]: Abstraction has 3610 states and 5651 transitions. [2021-12-22 12:30:16,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-22 12:30:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5651 transitions. [2021-12-22 12:30:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-22 12:30:16,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:16,199 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:16,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 12:30:16,200 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash -970573154, now seen corresponding path program 2 times [2021-12-22 12:30:16,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:16,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270142977] [2021-12-22 12:30:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:16,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:30:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 12:30:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:30:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:30:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:30:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 12:30:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:30:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:30:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 12:30:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-22 12:30:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:30:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-22 12:30:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-22 12:30:16,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:16,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270142977] [2021-12-22 12:30:16,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270142977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:16,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:16,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:30:16,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641086040] [2021-12-22 12:30:16,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:16,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:30:16,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:30:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:30:16,294 INFO L87 Difference]: Start difference. First operand 3610 states and 5651 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-22 12:30:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:16,958 INFO L93 Difference]: Finished difference Result 5333 states and 7624 transitions. [2021-12-22 12:30:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 12:30:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 175 [2021-12-22 12:30:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:16,964 INFO L225 Difference]: With dead ends: 5333 [2021-12-22 12:30:16,964 INFO L226 Difference]: Without dead ends: 2123 [2021-12-22 12:30:16,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:30:16,970 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4539 mSDsluCounter, 12134 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4554 SdHoareTripleChecker+Valid, 16254 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:16,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4554 Valid, 16254 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:30:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-12-22 12:30:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2021-12-22 12:30:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 1.8656927426955703) internal successors, (3959), 2122 states have internal predecessors, (3959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3959 transitions. [2021-12-22 12:30:17,000 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3959 transitions. Word has length 175 [2021-12-22 12:30:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:17,001 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3959 transitions. [2021-12-22 12:30:17,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-22 12:30:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3959 transitions. [2021-12-22 12:30:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1653 [2021-12-22 12:30:17,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:17,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:17,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 12:30:17,068 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash -267293435, now seen corresponding path program 1 times [2021-12-22 12:30:17,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:17,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404755837] [2021-12-22 12:30:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:17,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:17,979 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 12:30:17,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:17,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404755837] [2021-12-22 12:30:17,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404755837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:17,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:17,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 12:30:17,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782429980] [2021-12-22 12:30:17,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:17,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:17,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:30:17,984 INFO L87 Difference]: Start difference. First operand 2123 states and 3959 transitions. Second operand has 3 states, 3 states have (on average 550.6666666666666) internal successors, (1652), 2 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:23,349 INFO L93 Difference]: Finished difference Result 6058 states and 11375 transitions. [2021-12-22 12:30:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:23,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 550.6666666666666) internal successors, (1652), 2 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1652 [2021-12-22 12:30:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:23,362 INFO L225 Difference]: With dead ends: 6058 [2021-12-22 12:30:23,363 INFO L226 Difference]: Without dead ends: 3938 [2021-12-22 12:30:23,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:30:23,368 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 615 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 4951 mSolverCounterSat, 2591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 7542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2591 IncrementalHoareTripleChecker+Valid, 4951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:23,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1412 Invalid, 7542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2591 Valid, 4951 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-22 12:30:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-12-22 12:30:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3922. [2021-12-22 12:30:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 1.7309359857179292) internal successors, (6787), 3921 states have internal predecessors, (6787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 6787 transitions. [2021-12-22 12:30:23,437 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 6787 transitions. Word has length 1652 [2021-12-22 12:30:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:23,439 INFO L470 AbstractCegarLoop]: Abstraction has 3922 states and 6787 transitions. [2021-12-22 12:30:23,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 550.6666666666666) internal successors, (1652), 2 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 6787 transitions. [2021-12-22 12:30:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1664 [2021-12-22 12:30:23,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:23,467 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:23,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 12:30:23,468 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash 820985698, now seen corresponding path program 1 times [2021-12-22 12:30:23,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031183659] [2021-12-22 12:30:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:23,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:30:23,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:23,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031183659] [2021-12-22 12:30:23,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031183659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:23,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:23,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 12:30:23,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778945190] [2021-12-22 12:30:23,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:23,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:23,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:30:23,951 INFO L87 Difference]: Start difference. First operand 3922 states and 6787 transitions. Second operand has 3 states, 3 states have (on average 554.3333333333334) internal successors, (1663), 2 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:28,886 INFO L93 Difference]: Finished difference Result 11273 states and 19664 transitions. [2021-12-22 12:30:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 554.3333333333334) internal successors, (1663), 2 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1663 [2021-12-22 12:30:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:28,911 INFO L225 Difference]: With dead ends: 11273 [2021-12-22 12:30:28,911 INFO L226 Difference]: Without dead ends: 7354 [2021-12-22 12:30:28,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:30:28,920 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 2704 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 2374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 6848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2374 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:28,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2704 Valid, 1696 Invalid, 6848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2374 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-22 12:30:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7354 states. [2021-12-22 12:30:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7354 to 7352. [2021-12-22 12:30:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7352 states, 7351 states have (on average 1.5521697728200246) internal successors, (11410), 7351 states have internal predecessors, (11410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7352 states to 7352 states and 11410 transitions. [2021-12-22 12:30:29,029 INFO L78 Accepts]: Start accepts. Automaton has 7352 states and 11410 transitions. Word has length 1663 [2021-12-22 12:30:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:29,029 INFO L470 AbstractCegarLoop]: Abstraction has 7352 states and 11410 transitions. [2021-12-22 12:30:29,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 554.3333333333334) internal successors, (1663), 2 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7352 states and 11410 transitions. [2021-12-22 12:30:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1682 [2021-12-22 12:30:29,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:29,066 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:29,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 12:30:29,066 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:29,067 INFO L85 PathProgramCache]: Analyzing trace with hash 187002260, now seen corresponding path program 1 times [2021-12-22 12:30:29,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:29,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167580910] [2021-12-22 12:30:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:29,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:30:29,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:29,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167580910] [2021-12-22 12:30:29,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167580910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:29,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:29,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:30:29,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794387167] [2021-12-22 12:30:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:29,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:29,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:30:29,574 INFO L87 Difference]: Start difference. First operand 7352 states and 11410 transitions. Second operand has 3 states, 3 states have (on average 560.3333333333334) internal successors, (1681), 3 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:30:34,473 INFO L93 Difference]: Finished difference Result 21535 states and 33517 transitions. [2021-12-22 12:30:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:30:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 560.3333333333334) internal successors, (1681), 3 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1681 [2021-12-22 12:30:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:30:34,507 INFO L225 Difference]: With dead ends: 21535 [2021-12-22 12:30:34,508 INFO L226 Difference]: Without dead ends: 14186 [2021-12-22 12:30:34,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:30:34,524 INFO L933 BasicCegarLoop]: 3609 mSDtfsCounter, 2170 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 2214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 3855 SdHoareTripleChecker+Invalid, 6975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2214 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-22 12:30:34,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2170 Valid, 3855 Invalid, 6975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2214 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-22 12:30:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-12-22 12:30:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 14181. [2021-12-22 12:30:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14181 states, 14180 states have (on average 1.3787729196050775) internal successors, (19551), 14180 states have internal predecessors, (19551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14181 states to 14181 states and 19551 transitions. [2021-12-22 12:30:34,721 INFO L78 Accepts]: Start accepts. Automaton has 14181 states and 19551 transitions. Word has length 1681 [2021-12-22 12:30:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:30:34,721 INFO L470 AbstractCegarLoop]: Abstraction has 14181 states and 19551 transitions. [2021-12-22 12:30:34,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 560.3333333333334) internal successors, (1681), 3 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:30:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14181 states and 19551 transitions. [2021-12-22 12:30:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1699 [2021-12-22 12:30:34,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:30:34,771 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:34,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 12:30:34,772 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:30:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:30:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -478172217, now seen corresponding path program 1 times [2021-12-22 12:30:34,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:30:34,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953775427] [2021-12-22 12:30:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:30:34,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:30:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:30:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:30:35,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:30:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953775427] [2021-12-22 12:30:35,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953775427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:30:35,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:30:35,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 12:30:35,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315631134] [2021-12-22 12:30:35,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:30:35,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:30:35,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:30:35,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:30:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:30:35,413 INFO L87 Difference]: Start difference. First operand 14181 states and 19551 transitions. Second operand has 3 states, 3 states have (on average 566.0) internal successors, (1698), 2 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)