./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd23dfa6335616d8eec5b9783c1f6df5ab0e74e3c379835195329e627de34889 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:08:33,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:08:33,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:08:33,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:08:33,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:08:33,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:08:33,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:08:33,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:08:33,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:08:33,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:08:33,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:08:33,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:08:33,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:08:33,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:08:33,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:08:33,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:08:33,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:08:33,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:08:33,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:08:33,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:08:33,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:08:33,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:08:33,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:08:33,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:08:33,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:08:33,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:08:33,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:08:33,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:08:33,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:08:33,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:08:33,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:08:33,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:08:33,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:08:33,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:08:33,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:08:33,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:08:33,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:08:33,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:08:33,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:08:33,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:08:33,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:08:33,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:08:33,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:08:33,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:08:33,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:08:33,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:08:33,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:08:33,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:08:33,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:08:33,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:08:33,858 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:08:33,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:08:33,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:08:33,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:08:33,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:08:33,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:08:33,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:08:33,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:08:33,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:08:33,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:08:33,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:08:33,860 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:08:33,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:08:33,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:08:33,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:08:33,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:08:33,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:08:33,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:08:33,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:08:33,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:08:33,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:08:33,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:08:33,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:08:33,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:08:33,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:08:33,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:08:33,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd23dfa6335616d8eec5b9783c1f6df5ab0e74e3c379835195329e627de34889 [2021-12-21 14:08:34,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:08:34,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:08:34,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:08:34,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:08:34,108 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:08:34,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c [2021-12-21 14:08:34,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53052cef/eff5bc2d76d340338aba28408d9648e8/FLAGa2f4743a3 [2021-12-21 14:08:34,856 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:08:34,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c [2021-12-21 14:08:34,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53052cef/eff5bc2d76d340338aba28408d9648e8/FLAGa2f4743a3 [2021-12-21 14:08:35,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53052cef/eff5bc2d76d340338aba28408d9648e8 [2021-12-21 14:08:35,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:08:35,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:08:35,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:08:35,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:08:35,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:08:35,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:08:35" (1/1) ... [2021-12-21 14:08:35,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f96f955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:35, skipping insertion in model container [2021-12-21 14:08:35,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:08:35" (1/1) ... [2021-12-21 14:08:35,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:08:35,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:08:36,584 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.02.cil-1.c[377069,377082] [2021-12-21 14:08:36,607 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.02.cil-1.c[383339,383352] [2021-12-21 14:08:36,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:08:36,733 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:08:37,327 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.02.cil-1.c[377069,377082] [2021-12-21 14:08:37,333 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.02.cil-1.c[383339,383352] [2021-12-21 14:08:37,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:08:37,388 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:08:37,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37 WrapperNode [2021-12-21 14:08:37,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:08:37,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:08:37,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:08:37,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:08:37,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:37,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:37,772 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-21 14:08:37,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:08:37,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:08:37,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:08:37,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:08:37,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:37,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:37,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:37,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:37,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:37,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:38,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:38,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:08:38,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:08:38,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:08:38,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:08:38,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (1/1) ... [2021-12-21 14:08:38,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:08:38,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:08:38,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 14:08:38,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 14:08:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:08:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-21 14:08:38,269 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-21 14:08:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-21 14:08:38,269 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-21 14:08:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:08:38,269 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:08:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-21 14:08:38,269 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-21 14:08:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-21 14:08:38,270 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-21 14:08:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:08:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-21 14:08:38,270 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-21 14:08:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:08:38,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:08:38,409 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:08:38,418 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:08:43,254 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:08:43,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:08:43,282 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-21 14:08:43,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:08:43 BoogieIcfgContainer [2021-12-21 14:08:43,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:08:43,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:08:43,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:08:43,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:08:43,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:08:35" (1/3) ... [2021-12-21 14:08:43,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f692fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:08:43, skipping insertion in model container [2021-12-21 14:08:43,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:08:37" (2/3) ... [2021-12-21 14:08:43,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f692fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:08:43, skipping insertion in model container [2021-12-21 14:08:43,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:08:43" (3/3) ... [2021-12-21 14:08:43,294 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.02.cil-1.c [2021-12-21 14:08:43,300 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:08:43,301 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:08:43,342 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:08:43,347 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 14:08:43,347 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:08:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-21 14:08:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:08:43,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:43,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:43,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-21 14:08:43,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:43,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711595131] [2021-12-21 14:08:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:43,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:43,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:43,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:43,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:43,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:08:43,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:43,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711595131] [2021-12-21 14:08:43,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711595131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:43,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:08:43,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:08:43,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633329144] [2021-12-21 14:08:43,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:43,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:08:43,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:08:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:08:43,762 INFO L87 Difference]: Start difference. First operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:44,450 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-21 14:08:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:08:44,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-21 14:08:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:44,468 INFO L225 Difference]: With dead ends: 4802 [2021-12-21 14:08:44,469 INFO L226 Difference]: Without dead ends: 2427 [2021-12-21 14:08:44,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:08:44,480 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12460 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 16708 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:44,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:08:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-21 14:08:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-21 14:08:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8333333333333333) internal successors, (4257), 2325 states have internal predecessors, (4257), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-21 14:08:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-21 14:08:44,600 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-21 14:08:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:44,601 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-21 14:08:44,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-21 14:08:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:08:44,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:44,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:44,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:08:44,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:44,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-21 14:08:44,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:44,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281180096] [2021-12-21 14:08:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:44,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:44,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:44,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:44,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:08:44,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:44,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281180096] [2021-12-21 14:08:44,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281180096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:44,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:08:44,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:08:44,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992897250] [2021-12-21 14:08:44,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:08:44,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:08:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:08:44,746 INFO L87 Difference]: Start difference. First operand 2364 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:45,442 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-21 14:08:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:08:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-21 14:08:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:45,452 INFO L225 Difference]: With dead ends: 2807 [2021-12-21 14:08:45,452 INFO L226 Difference]: Without dead ends: 2574 [2021-12-21 14:08:45,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:08:45,455 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16464 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20710 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:45,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20710 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:08:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-21 14:08:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-21 14:08:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2413 states have (on average 1.8188976377952757) internal successors, (4389), 2417 states have internal predecessors, (4389), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-21 14:08:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-21 14:08:45,527 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-21 14:08:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:45,527 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-21 14:08:45,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-21 14:08:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:08:45,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:45,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:45,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:08:45,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-21 14:08:45,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:45,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079152428] [2021-12-21 14:08:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:45,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:45,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:45,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:45,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:45,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:08:45,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:45,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079152428] [2021-12-21 14:08:45,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079152428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:45,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:08:45,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:08:45,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927807130] [2021-12-21 14:08:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:45,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:08:45,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:08:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:08:45,653 INFO L87 Difference]: Start difference. First operand 2473 states and 4470 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:46,353 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-21 14:08:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:08:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-21 14:08:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:46,363 INFO L225 Difference]: With dead ends: 3193 [2021-12-21 14:08:46,364 INFO L226 Difference]: Without dead ends: 2851 [2021-12-21 14:08:46,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:08:46,367 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16279 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 20448 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:46,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 20448 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:08:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-21 14:08:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-21 14:08:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2596 states have (on average 1.7927580893682589) internal successors, (4654), 2602 states have internal predecessors, (4654), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-21 14:08:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-21 14:08:46,438 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-21 14:08:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:46,438 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-21 14:08:46,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-21 14:08:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:08:46,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:46,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:46,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:08:46,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-21 14:08:46,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221996166] [2021-12-21 14:08:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:46,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:46,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:46,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:46,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:08:46,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:46,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221996166] [2021-12-21 14:08:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221996166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:46,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:08:46,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:08:46,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134393390] [2021-12-21 14:08:46,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:46,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:08:46,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:08:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:08:46,549 INFO L87 Difference]: Start difference. First operand 2692 states and 4787 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:47,383 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-21 14:08:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:08:47,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-21 14:08:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:47,398 INFO L225 Difference]: With dead ends: 4037 [2021-12-21 14:08:47,399 INFO L226 Difference]: Without dead ends: 3476 [2021-12-21 14:08:47,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:08:47,402 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 20704 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:47,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20704 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:08:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-21 14:08:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-21 14:08:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.7530612244897958) internal successors, (5154), 2950 states have internal predecessors, (5154), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-21 14:08:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-21 14:08:47,490 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-21 14:08:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:47,491 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-21 14:08:47,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:47,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-21 14:08:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:08:47,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:47,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:47,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:08:47,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-21 14:08:47,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:47,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252752528] [2021-12-21 14:08:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:47,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:47,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:47,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:47,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:47,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:08:47,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:47,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252752528] [2021-12-21 14:08:47,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252752528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:47,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:08:47,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:08:47,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110133449] [2021-12-21 14:08:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:47,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:08:47,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:08:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:08:47,558 INFO L87 Difference]: Start difference. First operand 3104 states and 5389 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:48,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:48,257 INFO L93 Difference]: Finished difference Result 5435 states and 8809 transitions. [2021-12-21 14:08:48,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:08:48,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-21 14:08:48,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:48,275 INFO L225 Difference]: With dead ends: 5435 [2021-12-21 14:08:48,275 INFO L226 Difference]: Without dead ends: 4462 [2021-12-21 14:08:48,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:08:48,280 INFO L933 BasicCegarLoop]: 4224 mSDtfsCounter, 4362 mSDsluCounter, 16452 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20676 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:48,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4374 Valid, 20676 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:08:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-12-21 14:08:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3941. [2021-12-21 14:08:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3645 states have (on average 1.696570644718793) internal successors, (6184), 3663 states have internal predecessors, (6184), 176 states have call successors, (176), 102 states have call predecessors, (176), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-21 14:08:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 6633 transitions. [2021-12-21 14:08:48,405 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 6633 transitions. Word has length 68 [2021-12-21 14:08:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:48,405 INFO L470 AbstractCegarLoop]: Abstraction has 3941 states and 6633 transitions. [2021-12-21 14:08:48,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 6633 transitions. [2021-12-21 14:08:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:08:48,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:48,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:48,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:08:48,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-21 14:08:48,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:48,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11061687] [2021-12-21 14:08:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:48,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:48,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:48,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:48,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:48,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:08:48,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:48,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11061687] [2021-12-21 14:08:48,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11061687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:48,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:08:48,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:08:48,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144659687] [2021-12-21 14:08:48,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:48,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:08:48,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:08:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:08:48,474 INFO L87 Difference]: Start difference. First operand 3941 states and 6633 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:49,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:49,153 INFO L93 Difference]: Finished difference Result 7278 states and 11576 transitions. [2021-12-21 14:08:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:08:49,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-21 14:08:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:49,174 INFO L225 Difference]: With dead ends: 7278 [2021-12-21 14:08:49,174 INFO L226 Difference]: Without dead ends: 5469 [2021-12-21 14:08:49,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:08:49,181 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 4485 mSDsluCounter, 12257 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 16557 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:49,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4510 Valid, 16557 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:08:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-12-21 14:08:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4882. [2021-12-21 14:08:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4882 states, 4428 states have (on average 1.6456639566395663) internal successors, (7287), 4463 states have internal predecessors, (7287), 272 states have call successors, (272), 156 states have call predecessors, (272), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-21 14:08:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 7956 transitions. [2021-12-21 14:08:49,308 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 7956 transitions. Word has length 68 [2021-12-21 14:08:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:49,309 INFO L470 AbstractCegarLoop]: Abstraction has 4882 states and 7956 transitions. [2021-12-21 14:08:49,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:08:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 7956 transitions. [2021-12-21 14:08:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 14:08:49,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:49,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:49,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:08:49,317 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-21 14:08:49,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:49,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949185875] [2021-12-21 14:08:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:49,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:08:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:08:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:08:49,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:49,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949185875] [2021-12-21 14:08:49,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949185875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:08:49,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159548464] [2021-12-21 14:08:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:49,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:49,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:08:49,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:08:49,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:08:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:08:49,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:08:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:08:49,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:08:49,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159548464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:49,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:08:49,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:08:49,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346369459] [2021-12-21 14:08:49,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:49,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:08:49,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:49,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:08:49,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:49,715 INFO L87 Difference]: Start difference. First operand 4882 states and 7956 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:08:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:49,856 INFO L93 Difference]: Finished difference Result 10239 states and 15790 transitions. [2021-12-21 14:08:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:08:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-12-21 14:08:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:49,892 INFO L225 Difference]: With dead ends: 10239 [2021-12-21 14:08:49,892 INFO L226 Difference]: Without dead ends: 7489 [2021-12-21 14:08:49,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:49,903 INFO L933 BasicCegarLoop]: 4150 mSDtfsCounter, 4098 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4309 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:49,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4309 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:08:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7489 states. [2021-12-21 14:08:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7489 to 7435. [2021-12-21 14:08:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 6567 states have (on average 1.5784985533729252) internal successors, (10366), 6635 states have internal predecessors, (10366), 510 states have call successors, (510), 308 states have call predecessors, (510), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-21 14:08:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 11621 transitions. [2021-12-21 14:08:50,119 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 11621 transitions. Word has length 110 [2021-12-21 14:08:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:50,120 INFO L470 AbstractCegarLoop]: Abstraction has 7435 states and 11621 transitions. [2021-12-21 14:08:50,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:08:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 11621 transitions. [2021-12-21 14:08:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 14:08:50,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:50,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:50,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:08:50,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:50,343 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-21 14:08:50,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:50,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236135297] [2021-12-21 14:08:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:50,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:08:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:08:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:08:50,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:50,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236135297] [2021-12-21 14:08:50,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236135297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:08:50,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989718294] [2021-12-21 14:08:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:50,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:50,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:08:50,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:08:50,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:08:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:08:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:08:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 14:08:50,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:08:50,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989718294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:50,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:08:50,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:08:50,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28534712] [2021-12-21 14:08:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:50,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:08:50,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:08:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:50,658 INFO L87 Difference]: Start difference. First operand 7435 states and 11621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 14:08:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:50,891 INFO L93 Difference]: Finished difference Result 17751 states and 26795 transitions. [2021-12-21 14:08:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:08:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2021-12-21 14:08:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:51,007 INFO L225 Difference]: With dead ends: 17751 [2021-12-21 14:08:51,007 INFO L226 Difference]: Without dead ends: 12449 [2021-12-21 14:08:51,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:51,023 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 154 mSDsluCounter, 4138 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8437 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:51,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8437 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:08:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-12-21 14:08:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 12449. [2021-12-21 14:08:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12449 states, 10768 states have (on average 1.5169947994056463) internal successors, (16335), 10885 states have internal predecessors, (16335), 975 states have call successors, (975), 608 states have call predecessors, (975), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-21 14:08:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12449 states to 12449 states and 18906 transitions. [2021-12-21 14:08:51,371 INFO L78 Accepts]: Start accepts. Automaton has 12449 states and 18906 transitions. Word has length 110 [2021-12-21 14:08:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:51,372 INFO L470 AbstractCegarLoop]: Abstraction has 12449 states and 18906 transitions. [2021-12-21 14:08:51,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 14:08:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 12449 states and 18906 transitions. [2021-12-21 14:08:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 14:08:51,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:51,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:51,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:08:51,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-21 14:08:51,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-21 14:08:51,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059905018] [2021-12-21 14:08:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:51,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:08:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:08:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-21 14:08:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 14:08:51,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:51,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059905018] [2021-12-21 14:08:51,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059905018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:08:51,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721017479] [2021-12-21 14:08:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:51,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:08:51,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:08:51,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:08:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:51,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:08:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:08:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 14:08:52,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:08:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721017479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:52,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:08:52,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:08:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477565747] [2021-12-21 14:08:52,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:52,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:08:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:08:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:52,011 INFO L87 Difference]: Start difference. First operand 12449 states and 18906 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 14:08:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:52,497 INFO L93 Difference]: Finished difference Result 32641 states and 48463 transitions. [2021-12-21 14:08:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:08:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-21 14:08:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:52,556 INFO L225 Difference]: With dead ends: 32641 [2021-12-21 14:08:52,557 INFO L226 Difference]: Without dead ends: 22329 [2021-12-21 14:08:52,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:52,584 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4056 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4056 SdHoareTripleChecker+Valid, 4318 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:52,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4056 Valid, 4318 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:08:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22329 states. [2021-12-21 14:08:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22329 to 22119. [2021-12-21 14:08:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22119 states, 18858 states have (on average 1.4761374482978047) internal successors, (27837), 19089 states have internal predecessors, (27837), 1869 states have call successors, (1869), 1198 states have call predecessors, (1869), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-21 14:08:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22119 states to 22119 states and 32744 transitions. [2021-12-21 14:08:53,194 INFO L78 Accepts]: Start accepts. Automaton has 22119 states and 32744 transitions. Word has length 142 [2021-12-21 14:08:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:53,194 INFO L470 AbstractCegarLoop]: Abstraction has 22119 states and 32744 transitions. [2021-12-21 14:08:53,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 14:08:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22119 states and 32744 transitions. [2021-12-21 14:08:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 14:08:53,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:53,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:53,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:08:53,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:53,550 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-21 14:08:53,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:53,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427842294] [2021-12-21 14:08:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:53,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 14:08:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:08:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 14:08:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 14:08:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 14:08:53,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427842294] [2021-12-21 14:08:53,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427842294] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:08:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605167775] [2021-12-21 14:08:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:53,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:08:53,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:08:53,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:08:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:08:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:08:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:08:53,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:08:53,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605167775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:53,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:08:53,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:08:53,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680467017] [2021-12-21 14:08:53,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:53,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:08:53,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:08:53,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:53,987 INFO L87 Difference]: Start difference. First operand 22119 states and 32744 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:08:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:54,726 INFO L93 Difference]: Finished difference Result 44457 states and 65784 transitions. [2021-12-21 14:08:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:08:54,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-21 14:08:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:54,823 INFO L225 Difference]: With dead ends: 44457 [2021-12-21 14:08:54,823 INFO L226 Difference]: Without dead ends: 24473 [2021-12-21 14:08:54,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:54,886 INFO L933 BasicCegarLoop]: 4137 mSDtfsCounter, 4075 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4075 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:54,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4075 Valid, 4171 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:08:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24473 states. [2021-12-21 14:08:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24473 to 24473. [2021-12-21 14:08:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24473 states, 21000 states have (on average 1.4191904761904761) internal successors, (29803), 21231 states have internal predecessors, (29803), 1923 states have call successors, (1923), 1356 states have call predecessors, (1923), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-21 14:08:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24473 states to 24473 states and 34832 transitions. [2021-12-21 14:08:55,787 INFO L78 Accepts]: Start accepts. Automaton has 24473 states and 34832 transitions. Word has length 159 [2021-12-21 14:08:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:55,788 INFO L470 AbstractCegarLoop]: Abstraction has 24473 states and 34832 transitions. [2021-12-21 14:08:55,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:08:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 24473 states and 34832 transitions. [2021-12-21 14:08:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 14:08:55,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:55,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:55,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:08:56,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:56,047 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-21 14:08:56,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:56,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39150121] [2021-12-21 14:08:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:56,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 14:08:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:08:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 14:08:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 14:08:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:08:56,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:56,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39150121] [2021-12-21 14:08:56,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39150121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:08:56,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957375535] [2021-12-21 14:08:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:56,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:08:56,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:08:56,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 14:08:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:56,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:08:56,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:08:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-21 14:08:56,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:08:56,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957375535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:56,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:08:56,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:08:56,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531567027] [2021-12-21 14:08:56,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:56,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:08:56,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:56,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:08:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:56,415 INFO L87 Difference]: Start difference. First operand 24473 states and 34832 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:08:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:08:57,036 INFO L93 Difference]: Finished difference Result 41324 states and 58008 transitions. [2021-12-21 14:08:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:08:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-21 14:08:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:08:57,266 INFO L225 Difference]: With dead ends: 41324 [2021-12-21 14:08:57,266 INFO L226 Difference]: Without dead ends: 26013 [2021-12-21 14:08:57,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:57,289 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4088 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4325 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:08:57,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4325 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:08:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26013 states. [2021-12-21 14:08:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26013 to 25873. [2021-12-21 14:08:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25873 states, 22288 states have (on average 1.3940685570710696) internal successors, (31071), 22519 states have internal predecessors, (31071), 1943 states have call successors, (1943), 1448 states have call predecessors, (1943), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-21 14:08:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25873 states to 25873 states and 36232 transitions. [2021-12-21 14:08:58,128 INFO L78 Accepts]: Start accepts. Automaton has 25873 states and 36232 transitions. Word has length 159 [2021-12-21 14:08:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:08:58,129 INFO L470 AbstractCegarLoop]: Abstraction has 25873 states and 36232 transitions. [2021-12-21 14:08:58,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:08:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 25873 states and 36232 transitions. [2021-12-21 14:08:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:08:58,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:08:58,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:08:58,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 14:08:58,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 14:08:58,386 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:08:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:08:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-21 14:08:58,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:08:58,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305599291] [2021-12-21 14:08:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:58,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:08:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:08:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:08:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:08:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:08:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:08:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:08:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:08:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 14:08:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:08:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:08:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 14:08:58,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:08:58,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305599291] [2021-12-21 14:08:58,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305599291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:08:58,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853552814] [2021-12-21 14:08:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:08:58,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:08:58,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:08:58,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:08:58,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 14:08:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:08:58,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:08:58,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:08:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-21 14:08:58,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:08:58,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853552814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:08:58,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:08:58,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:08:58,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411254642] [2021-12-21 14:08:58,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:08:58,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:08:58,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:08:58,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:08:58,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:08:58,876 INFO L87 Difference]: Start difference. First operand 25873 states and 36232 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:09:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:09:00,203 INFO L93 Difference]: Finished difference Result 70245 states and 97750 transitions. [2021-12-21 14:09:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:09:00,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-21 14:09:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:09:00,371 INFO L225 Difference]: With dead ends: 70245 [2021-12-21 14:09:00,372 INFO L226 Difference]: Without dead ends: 46511 [2021-12-21 14:09:00,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:00,508 INFO L933 BasicCegarLoop]: 4172 mSDtfsCounter, 4102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:09:00,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 4334 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:09:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46511 states. [2021-12-21 14:09:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46511 to 45781. [2021-12-21 14:09:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45781 states, 39030 states have (on average 1.3636945939021266) internal successors, (53225), 39491 states have internal predecessors, (53225), 3677 states have call successors, (3677), 2688 states have call predecessors, (3677), 3072 states have return successors, (7178), 3665 states have call predecessors, (7178), 3677 states have call successors, (7178) [2021-12-21 14:09:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45781 states to 45781 states and 64080 transitions. [2021-12-21 14:09:02,261 INFO L78 Accepts]: Start accepts. Automaton has 45781 states and 64080 transitions. Word has length 160 [2021-12-21 14:09:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:09:02,261 INFO L470 AbstractCegarLoop]: Abstraction has 45781 states and 64080 transitions. [2021-12-21 14:09:02,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:09:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 45781 states and 64080 transitions. [2021-12-21 14:09:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:09:02,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:09:02,343 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:09:02,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 14:09:02,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:09:02,559 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:09:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:09:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-21 14:09:02,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:09:02,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870155526] [2021-12-21 14:09:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:02,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:09:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:09:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:09:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:09:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:09:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:09:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:09:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:09:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:09:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:09:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:09:02,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:09:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870155526] [2021-12-21 14:09:02,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870155526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:09:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220972621] [2021-12-21 14:09:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:02,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:09:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:09:02,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:09:02,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 14:09:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:09:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:09:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:09:03,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:09:03,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220972621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:09:03,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:09:03,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:09:03,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3514008] [2021-12-21 14:09:03,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:09:03,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:09:03,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:09:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:09:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:03,027 INFO L87 Difference]: Start difference. First operand 45781 states and 64080 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:09:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:09:04,482 INFO L93 Difference]: Finished difference Result 75161 states and 105873 transitions. [2021-12-21 14:09:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:09:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-21 14:09:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:09:04,615 INFO L225 Difference]: With dead ends: 75161 [2021-12-21 14:09:04,615 INFO L226 Difference]: Without dead ends: 40527 [2021-12-21 14:09:04,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:04,688 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4089 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 4169 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:09:04,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 4169 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:09:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40527 states. [2021-12-21 14:09:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40527 to 29943. [2021-12-21 14:09:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29943 states, 25784 states have (on average 1.3390862550418865) internal successors, (34527), 26025 states have internal predecessors, (34527), 2245 states have call successors, (2245), 1720 states have call predecessors, (2245), 1912 states have return successors, (3934), 2229 states have call predecessors, (3934), 2245 states have call successors, (3934) [2021-12-21 14:09:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29943 states to 29943 states and 40706 transitions. [2021-12-21 14:09:06,187 INFO L78 Accepts]: Start accepts. Automaton has 29943 states and 40706 transitions. Word has length 160 [2021-12-21 14:09:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:09:06,188 INFO L470 AbstractCegarLoop]: Abstraction has 29943 states and 40706 transitions. [2021-12-21 14:09:06,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:09:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 29943 states and 40706 transitions. [2021-12-21 14:09:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:09:06,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:09:06,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:09:06,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 14:09:06,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:09:06,457 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:09:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:09:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-21 14:09:06,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:09:06,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466289789] [2021-12-21 14:09:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:06,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:09:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:09:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:09:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:09:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:09:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:09:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:09:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:09:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:09:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:09:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:09:06,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:09:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466289789] [2021-12-21 14:09:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466289789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:09:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099317966] [2021-12-21 14:09:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:06,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:09:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:09:06,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:09:06,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 14:09:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:09:06,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:09:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:09:06,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:09:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099317966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:09:06,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:09:06,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:09:06,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591153946] [2021-12-21 14:09:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:09:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:09:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:09:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:09:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:06,886 INFO L87 Difference]: Start difference. First operand 29943 states and 40706 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:09:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:09:08,916 INFO L93 Difference]: Finished difference Result 82801 states and 112154 transitions. [2021-12-21 14:09:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:09:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-21 14:09:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:09:09,081 INFO L225 Difference]: With dead ends: 82801 [2021-12-21 14:09:09,082 INFO L226 Difference]: Without dead ends: 55005 [2021-12-21 14:09:09,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:09,135 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4098 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:09:09,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4341 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:09:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55005 states. [2021-12-21 14:09:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55005 to 53491. [2021-12-21 14:09:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53491 states, 45624 states have (on average 1.3054751884972822) internal successors, (59561), 46105 states have internal predecessors, (59561), 4265 states have call successors, (4265), 3216 states have call predecessors, (4265), 3600 states have return successors, (8740), 4233 states have call predecessors, (8740), 4265 states have call successors, (8740) [2021-12-21 14:09:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53491 states to 53491 states and 72566 transitions. [2021-12-21 14:09:11,698 INFO L78 Accepts]: Start accepts. Automaton has 53491 states and 72566 transitions. Word has length 160 [2021-12-21 14:09:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:09:11,699 INFO L470 AbstractCegarLoop]: Abstraction has 53491 states and 72566 transitions. [2021-12-21 14:09:11,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:09:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 53491 states and 72566 transitions. [2021-12-21 14:09:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:09:11,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:09:11,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:09:11,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 14:09:11,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 14:09:11,998 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:09:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:09:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-21 14:09:11,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:09:11,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381157525] [2021-12-21 14:09:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:11,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:09:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:09:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:09:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:09:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:09:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:09:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:09:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:09:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 14:09:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:09:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-21 14:09:12,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:09:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381157525] [2021-12-21 14:09:12,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381157525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:09:12,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:09:12,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:09:12,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590367709] [2021-12-21 14:09:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:09:12,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:09:12,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:09:12,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:09:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:09:12,248 INFO L87 Difference]: Start difference. First operand 53491 states and 72566 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:09:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:09:14,435 INFO L93 Difference]: Finished difference Result 102539 states and 136687 transitions. [2021-12-21 14:09:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:09:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-21 14:09:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:09:14,575 INFO L225 Difference]: With dead ends: 102539 [2021-12-21 14:09:14,575 INFO L226 Difference]: Without dead ends: 51193 [2021-12-21 14:09:14,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:14,642 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 282 mSDsluCounter, 12008 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16144 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:09:14,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16144 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:09:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-12-21 14:09:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 48475. [2021-12-21 14:09:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48475 states, 41692 states have (on average 1.3054542837954524) internal successors, (54427), 42585 states have internal predecessors, (54427), 3253 states have call successors, (3253), 2472 states have call predecessors, (3253), 3528 states have return successors, (7133), 3449 states have call predecessors, (7133), 3253 states have call successors, (7133) [2021-12-21 14:09:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48475 states to 48475 states and 64813 transitions. [2021-12-21 14:09:17,102 INFO L78 Accepts]: Start accepts. Automaton has 48475 states and 64813 transitions. Word has length 160 [2021-12-21 14:09:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:09:17,103 INFO L470 AbstractCegarLoop]: Abstraction has 48475 states and 64813 transitions. [2021-12-21 14:09:17,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:09:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 48475 states and 64813 transitions. [2021-12-21 14:09:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:09:17,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:09:17,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:09:17,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:09:17,287 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:09:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:09:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-21 14:09:17,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:09:17,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634736399] [2021-12-21 14:09:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:17,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:09:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:09:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:09:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:09:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:09:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:09:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:09:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:09:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:09:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:09:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 14:09:17,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:09:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634736399] [2021-12-21 14:09:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634736399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:09:17,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:09:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:09:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400632394] [2021-12-21 14:09:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:09:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:09:17,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:09:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:09:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:09:17,357 INFO L87 Difference]: Start difference. First operand 48475 states and 64813 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:09:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:09:19,086 INFO L93 Difference]: Finished difference Result 86015 states and 113686 transitions. [2021-12-21 14:09:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:09:19,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-21 14:09:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:09:19,203 INFO L225 Difference]: With dead ends: 86015 [2021-12-21 14:09:19,203 INFO L226 Difference]: Without dead ends: 39677 [2021-12-21 14:09:19,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:19,278 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 282 mSDsluCounter, 12007 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16142 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:09:19,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16142 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:09:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39677 states. [2021-12-21 14:09:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39677 to 37027. [2021-12-21 14:09:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37027 states, 31990 states have (on average 1.3210690840887778) internal successors, (42261), 32627 states have internal predecessors, (42261), 2427 states have call successors, (2427), 1856 states have call predecessors, (2427), 2608 states have return successors, (4967), 2559 states have call predecessors, (4967), 2427 states have call successors, (4967) [2021-12-21 14:09:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37027 states to 37027 states and 49655 transitions. [2021-12-21 14:09:21,229 INFO L78 Accepts]: Start accepts. Automaton has 37027 states and 49655 transitions. Word has length 160 [2021-12-21 14:09:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:09:21,229 INFO L470 AbstractCegarLoop]: Abstraction has 37027 states and 49655 transitions. [2021-12-21 14:09:21,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:09:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 37027 states and 49655 transitions. [2021-12-21 14:09:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 14:09:21,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:09:21,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:09:21,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:09:21,279 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:09:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:09:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-21 14:09:21,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:09:21,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198775150] [2021-12-21 14:09:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:21,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:09:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:09:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:09:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:09:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:09:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:09:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:09:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:09:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:09:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 14:09:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-21 14:09:21,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:09:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198775150] [2021-12-21 14:09:21,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198775150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:09:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193894162] [2021-12-21 14:09:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:21,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:09:21,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:09:21,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:09:21,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 14:09:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:09:21,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:09:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:09:21,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:09:21,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193894162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:09:21,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:09:21,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:09:21,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290359724] [2021-12-21 14:09:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:09:21,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:09:21,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:09:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:09:21,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:21,677 INFO L87 Difference]: Start difference. First operand 37027 states and 49655 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 14:09:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:09:23,164 INFO L93 Difference]: Finished difference Result 60935 states and 83299 transitions. [2021-12-21 14:09:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:09:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-21 14:09:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:09:23,250 INFO L225 Difference]: With dead ends: 60935 [2021-12-21 14:09:23,251 INFO L226 Difference]: Without dead ends: 37197 [2021-12-21 14:09:23,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:23,286 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 130 mSDsluCounter, 4115 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8382 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:09:23,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8382 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:09:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37197 states. [2021-12-21 14:09:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37197 to 37027. [2021-12-21 14:09:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37027 states, 31990 states have (on average 1.2994998437011567) internal successors, (41571), 32627 states have internal predecessors, (41571), 2427 states have call successors, (2427), 1856 states have call predecessors, (2427), 2608 states have return successors, (4967), 2559 states have call predecessors, (4967), 2427 states have call successors, (4967) [2021-12-21 14:09:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37027 states to 37027 states and 48965 transitions. [2021-12-21 14:09:25,047 INFO L78 Accepts]: Start accepts. Automaton has 37027 states and 48965 transitions. Word has length 162 [2021-12-21 14:09:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:09:25,048 INFO L470 AbstractCegarLoop]: Abstraction has 37027 states and 48965 transitions. [2021-12-21 14:09:25,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 14:09:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 37027 states and 48965 transitions. [2021-12-21 14:09:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 14:09:25,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:09:25,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:09:25,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 14:09:25,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 14:09:25,298 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:09:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:09:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-21 14:09:25,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:09:25,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176304620] [2021-12-21 14:09:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:25,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:09:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:09:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:09:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:09:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:09:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:09:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:09:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:09:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:09:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 14:09:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-21 14:09:25,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:09:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176304620] [2021-12-21 14:09:25,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176304620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:09:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051270830] [2021-12-21 14:09:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:25,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:09:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:09:25,384 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:09:25,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 14:09:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:25,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:09:25,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:09:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 14:09:25,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:09:25,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051270830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:09:25,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:09:25,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:09:25,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401465531] [2021-12-21 14:09:25,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:09:25,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:09:25,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:09:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:09:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:25,670 INFO L87 Difference]: Start difference. First operand 37027 states and 48965 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:09:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:09:27,166 INFO L93 Difference]: Finished difference Result 64013 states and 85317 transitions. [2021-12-21 14:09:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:09:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2021-12-21 14:09:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:09:27,231 INFO L225 Difference]: With dead ends: 64013 [2021-12-21 14:09:27,232 INFO L226 Difference]: Without dead ends: 31587 [2021-12-21 14:09:27,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:27,272 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 4110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4167 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:09:27,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 4167 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:09:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31587 states. [2021-12-21 14:09:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31587 to 30343. [2021-12-21 14:09:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30343 states, 26346 states have (on average 1.2746147422758674) internal successors, (33581), 26840 states have internal predecessors, (33581), 1931 states have call successors, (1931), 1480 states have call predecessors, (1931), 2064 states have return successors, (3669), 2030 states have call predecessors, (3669), 1931 states have call successors, (3669) [2021-12-21 14:09:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30343 states to 30343 states and 39181 transitions. [2021-12-21 14:09:28,678 INFO L78 Accepts]: Start accepts. Automaton has 30343 states and 39181 transitions. Word has length 162 [2021-12-21 14:09:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:09:28,679 INFO L470 AbstractCegarLoop]: Abstraction has 30343 states and 39181 transitions. [2021-12-21 14:09:28,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:09:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 30343 states and 39181 transitions. [2021-12-21 14:09:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 14:09:28,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:09:28,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:09:28,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-21 14:09:28,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 14:09:28,908 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:09:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:09:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1892311936, now seen corresponding path program 1 times [2021-12-21 14:09:28,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:09:28,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327217139] [2021-12-21 14:09:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:28,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:09:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:09:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:09:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:09:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:09:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:09:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:09:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:09:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 14:09:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:09:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 14:09:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-21 14:09:28,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:09:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327217139] [2021-12-21 14:09:28,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327217139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:09:28,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884304414] [2021-12-21 14:09:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:09:28,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:09:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:09:28,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:09:28,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 14:09:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:09:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:09:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:09:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 14:09:29,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:09:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884304414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:09:29,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:09:29,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:09:29,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031526821] [2021-12-21 14:09:29,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:09:29,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:09:29,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:09:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:09:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:09:29,264 INFO L87 Difference]: Start difference. First operand 30343 states and 39181 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)