./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_label45+token_ring.03.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 198234a6cbed333832b896acc347872fc09d4c349ed801953a7aa6331aa2ab3f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:43:37,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:43:37,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:43:37,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:43:37,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:43:37,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:43:37,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:43:37,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:43:37,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:43:37,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:43:37,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:43:37,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:43:37,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:43:37,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:43:37,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:43:37,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:43:37,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:43:37,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:43:37,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:43:37,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:43:37,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:43:37,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:43:37,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:43:37,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:43:37,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:43:37,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:43:37,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:43:37,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:43:37,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:43:37,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:43:37,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:43:37,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:43:37,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:43:37,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:43:37,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:43:37,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:43:37,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:43:37,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:43:37,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:43:37,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:43:37,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:43:37,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:43:37,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:43:37,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:43:37,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:43:37,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:43:37,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:43:37,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:43:37,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:43:37,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:43:37,955 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:43:37,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:43:37,956 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:43:37,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:43:37,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:43:37,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:43:37,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:43:37,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:43:37,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:43:37,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:43:37,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:43:37,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:43:37,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:43:37,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:43:37,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:43:37,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:43:37,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:43:37,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:43:37,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:43:37,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:43:37,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:43:37,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:43:37,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:43:37,960 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:43:37,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:43:37,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:43:37,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 198234a6cbed333832b896acc347872fc09d4c349ed801953a7aa6331aa2ab3f [2021-12-14 15:43:38,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:43:38,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:43:38,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:43:38,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:43:38,261 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:43:38,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-2.c [2021-12-14 15:43:38,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf5c5f7e/1be40a15f1604f058c91c4260f042b6b/FLAG9fde01137 [2021-12-14 15:43:39,219 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:43:39,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-2.c [2021-12-14 15:43:39,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf5c5f7e/1be40a15f1604f058c91c4260f042b6b/FLAG9fde01137 [2021-12-14 15:43:39,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf5c5f7e/1be40a15f1604f058c91c4260f042b6b [2021-12-14 15:43:39,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:43:39,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:43:39,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:43:39,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:43:39,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:43:39,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:43:39" (1/1) ... [2021-12-14 15:43:39,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46fcf8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:39, skipping insertion in model container [2021-12-14 15:43:39,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:43:39" (1/1) ... [2021-12-14 15:43:39,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:43:39,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:43:40,977 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_label45+token_ring.03.cil-2.c[380323,380336] [2021-12-14 15:43:40,999 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_label45+token_ring.03.cil-2.c[383339,383352] [2021-12-14 15:43:41,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:43:41,149 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:43:42,078 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_label45+token_ring.03.cil-2.c[380323,380336] [2021-12-14 15:43:42,126 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_label45+token_ring.03.cil-2.c[383339,383352] [2021-12-14 15:43:42,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:43:42,202 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:43:42,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42 WrapperNode [2021-12-14 15:43:42,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:43:42,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:43:42,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:43:42,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:43:42,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:42,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:42,782 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-14 15:43:42,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:43:42,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:43:42,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:43:42,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:43:42,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:42,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:42,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:42,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:43,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:43,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:43,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:43,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:43:43,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:43:43,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:43:43,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:43:43,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (1/1) ... [2021-12-14 15:43:43,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:43:43,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:43:43,226 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) [2021-12-14 15:43:43,233 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 [2021-12-14 15:43:43,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:43:43,268 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 15:43:43,268 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 15:43:43,270 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 15:43:43,270 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 15:43:43,270 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 15:43:43,271 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 15:43:43,271 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 15:43:43,271 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 15:43:43,271 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 15:43:43,271 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 15:43:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 15:43:43,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 15:43:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:43:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:43:43,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:43:43,415 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:43:43,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:43:49,355 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:43:49,381 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:43:49,381 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-14 15:43:49,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:43:49 BoogieIcfgContainer [2021-12-14 15:43:49,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:43:49,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:43:49,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:43:49,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:43:49,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:43:39" (1/3) ... [2021-12-14 15:43:49,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f1c058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:43:49, skipping insertion in model container [2021-12-14 15:43:49,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:42" (2/3) ... [2021-12-14 15:43:49,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f1c058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:43:49, skipping insertion in model container [2021-12-14 15:43:49,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:43:49" (3/3) ... [2021-12-14 15:43:49,393 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.03.cil-2.c [2021-12-14 15:43:49,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:43:49,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:43:49,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:43:49,452 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 [2021-12-14 15:43:49,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:43:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-14 15:43:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:49,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:49,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:49,609 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:49,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:49,619 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-14 15:43:49,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:49,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643315664] [2021-12-14 15:43:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:49,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:49,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:49,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:49,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:50,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:50,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643315664] [2021-12-14 15:43:50,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643315664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:50,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:50,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:43:50,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399099983] [2021-12-14 15:43:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:50,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:43:50,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:43:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:43:50,054 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-14 15:43:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:43:51,058 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-14 15:43:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:43:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-14 15:43:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:43:51,085 INFO L225 Difference]: With dead ends: 4899 [2021-12-14 15:43:51,085 INFO L226 Difference]: Without dead ends: 2500 [2021-12-14 15:43:51,095 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 [2021-12-14 15:43:51,099 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:43:51,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:43:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-14 15:43:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-14 15:43:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-14 15:43:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-14 15:43:51,246 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-14 15:43:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:43:51,246 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-14 15:43:51,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-14 15:43:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-14 15:43:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:51,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:51,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:51,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:43:51,253 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-14 15:43:51,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674908142] [2021-12-14 15:43:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:51,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:51,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:51,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:51,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:51,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:51,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674908142] [2021-12-14 15:43:51,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674908142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:51,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:51,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:43:51,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022211929] [2021-12-14 15:43:51,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:51,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:43:51,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:43:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:43:51,411 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:43:52,073 INFO L93 Difference]: Finished difference Result 2787 states and 4973 transitions. [2021-12-14 15:43:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:43:52,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:43:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:43:52,087 INFO L225 Difference]: With dead ends: 2787 [2021-12-14 15:43:52,087 INFO L226 Difference]: Without dead ends: 2504 [2021-12-14 15:43:52,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:43:52,094 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4337 mSDsluCounter, 16192 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 20372 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:43:52,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4348 Valid, 20372 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:43:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-12-14 15:43:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2415. [2021-12-14 15:43:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8283424715309995) internal successors, (4335), 2374 states have internal predecessors, (4335), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-14 15:43:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4396 transitions. [2021-12-14 15:43:52,176 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4396 transitions. Word has length 79 [2021-12-14 15:43:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:43:52,177 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4396 transitions. [2021-12-14 15:43:52,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4396 transitions. [2021-12-14 15:43:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:52,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:52,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:52,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:43:52,183 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-14 15:43:52,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:52,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996762737] [2021-12-14 15:43:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:52,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:52,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:52,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:52,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:52,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:52,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:52,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:52,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996762737] [2021-12-14 15:43:52,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996762737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:52,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:52,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:43:52,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636417138] [2021-12-14 15:43:52,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:52,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:43:52,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:43:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:43:52,350 INFO L87 Difference]: Start difference. First operand 2415 states and 4396 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:43:53,587 INFO L93 Difference]: Finished difference Result 2965 states and 5230 transitions. [2021-12-14 15:43:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:43:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:43:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:43:53,599 INFO L225 Difference]: With dead ends: 2965 [2021-12-14 15:43:53,599 INFO L226 Difference]: Without dead ends: 2682 [2021-12-14 15:43:53,601 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 [2021-12-14 15:43:53,602 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 4460 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4470 SdHoareTripleChecker+Valid, 20909 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:43:53,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4470 Valid, 20909 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:43:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-12-14 15:43:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2548. [2021-12-14 15:43:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8120724346076458) internal successors, (4503), 2489 states have internal predecessors, (4503), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-14 15:43:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4590 transitions. [2021-12-14 15:43:53,676 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4590 transitions. Word has length 79 [2021-12-14 15:43:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:43:53,677 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4590 transitions. [2021-12-14 15:43:53,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4590 transitions. [2021-12-14 15:43:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:53,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:53,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:53,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:43:53,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-14 15:43:53,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:53,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488953480] [2021-12-14 15:43:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:53,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:53,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:53,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:53,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:53,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:53,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:53,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488953480] [2021-12-14 15:43:53,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488953480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:53,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:53,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:43:53,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790426970] [2021-12-14 15:43:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:53,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:43:53,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:43:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:43:53,783 INFO L87 Difference]: Start difference. First operand 2548 states and 4590 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:43:54,930 INFO L93 Difference]: Finished difference Result 3444 states and 5944 transitions. [2021-12-14 15:43:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:43:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:43:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:43:54,945 INFO L225 Difference]: With dead ends: 3444 [2021-12-14 15:43:54,945 INFO L226 Difference]: Without dead ends: 3028 [2021-12-14 15:43:54,948 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 [2021-12-14 15:43:54,949 INFO L933 BasicCegarLoop]: 4306 mSDtfsCounter, 4457 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4467 SdHoareTripleChecker+Valid, 20897 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:43:54,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4467 Valid, 20897 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:43:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-12-14 15:43:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2816. [2021-12-14 15:43:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2715 states have (on average 1.7834254143646409) internal successors, (4842), 2721 states have internal predecessors, (4842), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-14 15:43:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4985 transitions. [2021-12-14 15:43:55,066 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4985 transitions. Word has length 79 [2021-12-14 15:43:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:43:55,066 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4985 transitions. [2021-12-14 15:43:55,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4985 transitions. [2021-12-14 15:43:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:55,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:55,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:55,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:43:55,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-14 15:43:55,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:55,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62461135] [2021-12-14 15:43:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:55,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:55,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:55,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:55,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:55,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:55,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:55,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:55,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62461135] [2021-12-14 15:43:55,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62461135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:55,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:55,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:43:55,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007389119] [2021-12-14 15:43:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:55,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:43:55,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:43:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:43:55,174 INFO L87 Difference]: Start difference. First operand 2816 states and 4985 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:43:56,379 INFO L93 Difference]: Finished difference Result 4578 states and 7629 transitions. [2021-12-14 15:43:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:43:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:43:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:43:56,397 INFO L225 Difference]: With dead ends: 4578 [2021-12-14 15:43:56,397 INFO L226 Difference]: Without dead ends: 3894 [2021-12-14 15:43:56,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:43:56,403 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 4588 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4602 SdHoareTripleChecker+Valid, 20883 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:43:56,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4602 Valid, 20883 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:43:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-12-14 15:43:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3342. [2021-12-14 15:43:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3169 states have (on average 1.7399810665825182) internal successors, (5514), 3179 states have internal predecessors, (5514), 109 states have call successors, (109), 54 states have call predecessors, (109), 62 states have return successors, (144), 116 states have call predecessors, (144), 109 states have call successors, (144) [2021-12-14 15:43:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 5767 transitions. [2021-12-14 15:43:56,548 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 5767 transitions. Word has length 79 [2021-12-14 15:43:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:43:56,549 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 5767 transitions. [2021-12-14 15:43:56,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 5767 transitions. [2021-12-14 15:43:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:56,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:56,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:43:56,556 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-14 15:43:56,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:56,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806158794] [2021-12-14 15:43:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:56,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:56,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:56,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:56,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:56,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806158794] [2021-12-14 15:43:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806158794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:56,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:56,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:43:56,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616738464] [2021-12-14 15:43:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:56,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:43:56,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:43:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:43:56,673 INFO L87 Difference]: Start difference. First operand 3342 states and 5767 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:43:57,872 INFO L93 Difference]: Finished difference Result 6510 states and 10517 transitions. [2021-12-14 15:43:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:43:57,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:43:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:43:57,897 INFO L225 Difference]: With dead ends: 6510 [2021-12-14 15:43:57,897 INFO L226 Difference]: Without dead ends: 5300 [2021-12-14 15:43:57,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:43:57,904 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4474 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4483 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:43:57,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4483 Valid, 20917 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:43:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2021-12-14 15:43:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 4348. [2021-12-14 15:43:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4035 states have (on average 1.6837670384138785) internal successors, (6794), 4053 states have internal predecessors, (6794), 193 states have call successors, (193), 102 states have call predecessors, (193), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2021-12-14 15:43:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 7277 transitions. [2021-12-14 15:43:58,047 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 7277 transitions. Word has length 79 [2021-12-14 15:43:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:43:58,048 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 7277 transitions. [2021-12-14 15:43:58,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 7277 transitions. [2021-12-14 15:43:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:58,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:58,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:58,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:43:58,051 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:58,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-14 15:43:58,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:58,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806148921] [2021-12-14 15:43:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:58,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:58,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:58,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:58,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:58,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:58,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806148921] [2021-12-14 15:43:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806148921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:58,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:58,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:43:58,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765040326] [2021-12-14 15:43:58,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:58,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:43:58,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:43:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:43:58,128 INFO L87 Difference]: Start difference. First operand 4348 states and 7277 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:43:59,244 INFO L93 Difference]: Finished difference Result 9866 states and 15579 transitions. [2021-12-14 15:43:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:43:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:43:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:43:59,285 INFO L225 Difference]: With dead ends: 9866 [2021-12-14 15:43:59,285 INFO L226 Difference]: Without dead ends: 7650 [2021-12-14 15:43:59,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:43:59,298 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4465 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20870 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:43:59,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20870 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:43:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2021-12-14 15:43:59,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 6407. [2021-12-14 15:43:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 5822 states have (on average 1.6241841291652352) internal successors, (9456), 5856 states have internal predecessors, (9456), 353 states have call successors, (353), 198 states have call predecessors, (353), 230 states have return successors, (628), 384 states have call predecessors, (628), 353 states have call successors, (628) [2021-12-14 15:43:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 10437 transitions. [2021-12-14 15:43:59,590 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 10437 transitions. Word has length 79 [2021-12-14 15:43:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:43:59,590 INFO L470 AbstractCegarLoop]: Abstraction has 6407 states and 10437 transitions. [2021-12-14 15:43:59,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-14 15:43:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 10437 transitions. [2021-12-14 15:43:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:43:59,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:43:59,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:43:59,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:43:59,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:43:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:43:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-14 15:43:59,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:43:59,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743350442] [2021-12-14 15:43:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:43:59,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:43:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:43:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:59,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:43:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:59,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:43:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:43:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:59,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:43:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:43:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:43:59,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:43:59,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743350442] [2021-12-14 15:43:59,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743350442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:43:59,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:43:59,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:43:59,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623425274] [2021-12-14 15:43:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:43:59,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:43:59,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:43:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:43:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:43:59,676 INFO L87 Difference]: Start difference. First operand 6407 states and 10437 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-14 15:44:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:00,892 INFO L93 Difference]: Finished difference Result 14332 states and 22441 transitions. [2021-12-14 15:44:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:44:00,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-14 15:44:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:00,926 INFO L225 Difference]: With dead ends: 14332 [2021-12-14 15:44:00,926 INFO L226 Difference]: Without dead ends: 10058 [2021-12-14 15:44:00,942 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 [2021-12-14 15:44:00,943 INFO L933 BasicCegarLoop]: 4385 mSDtfsCounter, 4628 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4655 SdHoareTripleChecker+Valid, 16730 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:00,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4655 Valid, 16730 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:44:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10058 states. [2021-12-14 15:44:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10058 to 8576. [2021-12-14 15:44:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 7684 states have (on average 1.5802967204580947) internal successors, (12143), 7751 states have internal predecessors, (12143), 542 states have call successors, (542), 300 states have call predecessors, (542), 348 states have return successors, (899), 556 states have call predecessors, (899), 542 states have call successors, (899) [2021-12-14 15:44:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 13584 transitions. [2021-12-14 15:44:01,255 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 13584 transitions. Word has length 79 [2021-12-14 15:44:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:01,255 INFO L470 AbstractCegarLoop]: Abstraction has 8576 states and 13584 transitions. [2021-12-14 15:44:01,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-14 15:44:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 13584 transitions. [2021-12-14 15:44:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 15:44:01,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:01,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:01,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:44:01,272 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-14 15:44:01,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460541260] [2021-12-14 15:44:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:01,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:44:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:44:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:44:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:44:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:44:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:44:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:44:01,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:01,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460541260] [2021-12-14 15:44:01,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460541260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670128991] [2021-12-14 15:44:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:01,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:01,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:01,407 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) [2021-12-14 15:44:01,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:44:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 15:44:01,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670128991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:01,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:01,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:44:01,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860096229] [2021-12-14 15:44:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:01,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:01,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:01,802 INFO L87 Difference]: Start difference. First operand 8576 states and 13584 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2021-12-14 15:44:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:02,113 INFO L93 Difference]: Finished difference Result 21283 states and 32724 transitions. [2021-12-14 15:44:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 128 [2021-12-14 15:44:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:02,168 INFO L225 Difference]: With dead ends: 21283 [2021-12-14 15:44:02,169 INFO L226 Difference]: Without dead ends: 14840 [2021-12-14 15:44:02,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:02,199 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4135 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 4388 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 [2021-12-14 15:44:02,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4135 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14840 states. [2021-12-14 15:44:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14840 to 14738. [2021-12-14 15:44:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 12986 states have (on average 1.5333436008008625) internal successors, (19912), 13118 states have internal predecessors, (19912), 1054 states have call successors, (1054), 600 states have call predecessors, (1054), 696 states have return successors, (1737), 1051 states have call predecessors, (1737), 1054 states have call successors, (1737) [2021-12-14 15:44:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 22703 transitions. [2021-12-14 15:44:02,854 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 22703 transitions. Word has length 128 [2021-12-14 15:44:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:02,855 INFO L470 AbstractCegarLoop]: Abstraction has 14738 states and 22703 transitions. [2021-12-14 15:44:02,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2021-12-14 15:44:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 22703 transitions. [2021-12-14 15:44:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 15:44:02,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:02,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:02,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 15:44:03,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:03,095 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-14 15:44:03,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:03,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714157091] [2021-12-14 15:44:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:03,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:44:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:44:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:44:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:44:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:44:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:44:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:44:03,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:03,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714157091] [2021-12-14 15:44:03,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714157091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396565331] [2021-12-14 15:44:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:03,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:03,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:03,224 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) [2021-12-14 15:44:03,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:44:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 15:44:03,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396565331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:03,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:03,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:44:03,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563422166] [2021-12-14 15:44:03,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:03,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:03,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:03,572 INFO L87 Difference]: Start difference. First operand 14738 states and 22703 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2021-12-14 15:44:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:04,145 INFO L93 Difference]: Finished difference Result 39591 states and 60013 transitions. [2021-12-14 15:44:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 128 [2021-12-14 15:44:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:04,271 INFO L225 Difference]: With dead ends: 39591 [2021-12-14 15:44:04,272 INFO L226 Difference]: Without dead ends: 26986 [2021-12-14 15:44:04,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:04,329 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4129 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 4388 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 [2021-12-14 15:44:04,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4129 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26986 states. [2021-12-14 15:44:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26986 to 26784. [2021-12-14 15:44:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26784 states, 23338 states have (on average 1.501756791498843) internal successors, (35048), 23600 states have internal predecessors, (35048), 2052 states have call successors, (2052), 1200 states have call predecessors, (2052), 1392 states have return successors, (3387), 2015 states have call predecessors, (3387), 2052 states have call successors, (3387) [2021-12-14 15:44:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26784 states to 26784 states and 40487 transitions. [2021-12-14 15:44:05,581 INFO L78 Accepts]: Start accepts. Automaton has 26784 states and 40487 transitions. Word has length 128 [2021-12-14 15:44:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:05,582 INFO L470 AbstractCegarLoop]: Abstraction has 26784 states and 40487 transitions. [2021-12-14 15:44:05,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2021-12-14 15:44:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 26784 states and 40487 transitions. [2021-12-14 15:44:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 15:44:05,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:05,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:05,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 15:44:05,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 15:44:05,856 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-14 15:44:05,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:05,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617285846] [2021-12-14 15:44:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:05,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:44:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:44:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:44:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:44:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:44:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:44:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:44:05,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617285846] [2021-12-14 15:44:05,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617285846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783423004] [2021-12-14 15:44:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:05,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:05,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:05,975 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) [2021-12-14 15:44:05,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 15:44:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 15:44:06,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783423004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:06,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:06,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:44:06,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355263171] [2021-12-14 15:44:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:06,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:06,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:06,306 INFO L87 Difference]: Start difference. First operand 26784 states and 40487 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-12-14 15:44:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:07,632 INFO L93 Difference]: Finished difference Result 75073 states and 113309 transitions. [2021-12-14 15:44:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:07,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 128 [2021-12-14 15:44:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:07,929 INFO L225 Difference]: With dead ends: 75073 [2021-12-14 15:44:07,929 INFO L226 Difference]: Without dead ends: 50423 [2021-12-14 15:44:08,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:08,010 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 193 mSDsluCounter, 4179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8559 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 [2021-12-14 15:44:08,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50423 states. [2021-12-14 15:44:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50423 to 50423. [2021-12-14 15:44:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50423 states, 43670 states have (on average 1.477329974811083) internal successors, (64515), 44125 states have internal predecessors, (64515), 3967 states have call successors, (3967), 2400 states have call predecessors, (3967), 2784 states have return successors, (7350), 3961 states have call predecessors, (7350), 3967 states have call successors, (7350) [2021-12-14 15:44:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50423 states to 50423 states and 75832 transitions. [2021-12-14 15:44:09,980 INFO L78 Accepts]: Start accepts. Automaton has 50423 states and 75832 transitions. Word has length 128 [2021-12-14 15:44:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:09,980 INFO L470 AbstractCegarLoop]: Abstraction has 50423 states and 75832 transitions. [2021-12-14 15:44:09,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-12-14 15:44:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 50423 states and 75832 transitions. [2021-12-14 15:44:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-14 15:44:10,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:10,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:10,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 15:44:10,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:10,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-14 15:44:10,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:10,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405650975] [2021-12-14 15:44:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:10,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:44:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:44:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:44:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:44:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:44:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:44:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 15:44:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 15:44:10,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405650975] [2021-12-14 15:44:10,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405650975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867149372] [2021-12-14 15:44:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:10,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:10,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:10,490 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) [2021-12-14 15:44:10,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 15:44:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:10,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 15:44:10,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:10,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867149372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:10,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:10,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:44:10,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801350856] [2021-12-14 15:44:10,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:10,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:10,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:10,942 INFO L87 Difference]: Start difference. First operand 50423 states and 75832 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-12-14 15:44:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:13,600 INFO L93 Difference]: Finished difference Result 144551 states and 217323 transitions. [2021-12-14 15:44:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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 166 [2021-12-14 15:44:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:14,242 INFO L225 Difference]: With dead ends: 144551 [2021-12-14 15:44:14,243 INFO L226 Difference]: Without dead ends: 96267 [2021-12-14 15:44:14,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:14,345 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4085 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 4397 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 [2021-12-14 15:44:14,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 4397 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96267 states. [2021-12-14 15:44:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96267 to 95465. [2021-12-14 15:44:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95465 states, 82660 states have (on average 1.4675175417372368) internal successors, (121305), 83567 states have internal predecessors, (121305), 7381 states have call successors, (7381), 4654 states have call predecessors, (7381), 5422 states have return successors, (13774), 7307 states have call predecessors, (13774), 7381 states have call successors, (13774) [2021-12-14 15:44:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95465 states to 95465 states and 142460 transitions. [2021-12-14 15:44:18,115 INFO L78 Accepts]: Start accepts. Automaton has 95465 states and 142460 transitions. Word has length 166 [2021-12-14 15:44:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:18,116 INFO L470 AbstractCegarLoop]: Abstraction has 95465 states and 142460 transitions. [2021-12-14 15:44:18,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-12-14 15:44:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 95465 states and 142460 transitions. [2021-12-14 15:44:18,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-14 15:44:18,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:18,672 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:18,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 15:44:18,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:18,891 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-14 15:44:18,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:18,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343059271] [2021-12-14 15:44:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:18,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:18,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:18,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:44:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:44:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:18,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:44:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:18,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:44:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:18,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 15:44:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:18,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:44:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 15:44:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-14 15:44:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-14 15:44:19,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343059271] [2021-12-14 15:44:19,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343059271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119092028] [2021-12-14 15:44:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:19,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:19,032 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) [2021-12-14 15:44:19,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 15:44:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 15:44:19,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:19,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119092028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:19,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:19,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:44:19,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084317606] [2021-12-14 15:44:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:19,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:19,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:19,474 INFO L87 Difference]: Start difference. First operand 95465 states and 142460 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-14 15:44:22,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:22,193 INFO L93 Difference]: Finished difference Result 146177 states and 218203 transitions. [2021-12-14 15:44:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:22,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 184 [2021-12-14 15:44:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:22,695 INFO L225 Difference]: With dead ends: 146177 [2021-12-14 15:44:22,696 INFO L226 Difference]: Without dead ends: 81821 [2021-12-14 15:44:22,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:22,813 INFO L933 BasicCegarLoop]: 4177 mSDtfsCounter, 4107 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4221 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 [2021-12-14 15:44:22,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 4221 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81821 states. [2021-12-14 15:44:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81821 to 59061. [2021-12-14 15:44:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59061 states, 51472 states have (on average 1.4258043207957725) internal successors, (73389), 51935 states have internal predecessors, (73389), 4297 states have call successors, (4297), 2906 states have call predecessors, (4297), 3290 states have return successors, (6802), 4251 states have call predecessors, (6802), 4297 states have call successors, (6802) [2021-12-14 15:44:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59061 states to 59061 states and 84488 transitions. [2021-12-14 15:44:25,347 INFO L78 Accepts]: Start accepts. Automaton has 59061 states and 84488 transitions. Word has length 184 [2021-12-14 15:44:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:25,348 INFO L470 AbstractCegarLoop]: Abstraction has 59061 states and 84488 transitions. [2021-12-14 15:44:25,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-14 15:44:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 59061 states and 84488 transitions. [2021-12-14 15:44:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-14 15:44:25,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:25,650 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:25,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 15:44:25,850 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,SelfDestructingSolverStorable12 [2021-12-14 15:44:25,850 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-12-14 15:44:25,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802209313] [2021-12-14 15:44:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:25,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:44:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:44:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:44:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:44:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 15:44:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:44:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 15:44:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-14 15:44:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-14 15:44:25,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:25,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802209313] [2021-12-14 15:44:25,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802209313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:25,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76842488] [2021-12-14 15:44:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:25,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:25,986 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) [2021-12-14 15:44:25,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 15:44:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:44:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-14 15:44:26,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:26,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76842488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:26,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:26,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:44:26,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981298892] [2021-12-14 15:44:26,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:26,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:26,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:26,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:26,414 INFO L87 Difference]: Start difference. First operand 59061 states and 84488 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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)