./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:11:22,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:11:22,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:11:22,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:11:22,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:11:22,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:11:22,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:11:22,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:11:22,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:11:22,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:11:22,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:11:22,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:11:22,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:11:22,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:11:22,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:11:22,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:11:22,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:11:22,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:11:22,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:11:22,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:11:22,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:11:22,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:11:22,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:11:22,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:11:22,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:11:22,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:11:22,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:11:22,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:11:22,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:11:22,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:11:22,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:11:22,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:11:22,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:11:22,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:11:22,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:11:22,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:11:22,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:11:22,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:11:22,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:11:22,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:11:22,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:11:22,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:11:22,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:11:22,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:11:22,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:11:22,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:11:22,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:11:22,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:11:22,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:11:22,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:11:22,956 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:11:22,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:11:22,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:11:22,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:11:22,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:11:22,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:11:22,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:11:22,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:11:22,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:11:22,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:11:22,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:11:22,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:11:22,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:11:22,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:11:22,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:11:22,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:11:22,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:11:22,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:11:22,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:11:22,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:11:22,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:11:22,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:11:22,961 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:11:22,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:11:22,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:11:22,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:11:22,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 [2021-12-22 13:11:23,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:11:23,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:11:23,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:11:23,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:11:23,218 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:11:23,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-22 13:11:23,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aaf5d7f8/187abe7fcfc94568929c6ad2f0c99b6c/FLAG57dfa62c7 [2021-12-22 13:11:23,760 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:11:23,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-22 13:11:23,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aaf5d7f8/187abe7fcfc94568929c6ad2f0c99b6c/FLAG57dfa62c7 [2021-12-22 13:11:24,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aaf5d7f8/187abe7fcfc94568929c6ad2f0c99b6c [2021-12-22 13:11:24,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:11:24,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:11:24,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:11:24,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:11:24,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:11:24,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42250d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24, skipping insertion in model container [2021-12-22 13:11:24,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:11:24,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:11:24,489 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/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2021-12-22 13:11:24,561 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/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2021-12-22 13:11:24,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:11:24,706 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:11:24,716 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/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2021-12-22 13:11:24,735 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/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2021-12-22 13:11:24,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:11:24,787 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:11:24,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24 WrapperNode [2021-12-22 13:11:24,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:11:24,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:11:24,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:11:24,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:11:24,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,867 INFO L137 Inliner]: procedures = 70, calls = 82, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1002 [2021-12-22 13:11:24,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:11:24,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:11:24,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:11:24,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:11:24,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:11:24,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:11:24,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:11:24,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:11:24,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (1/1) ... [2021-12-22 13:11:24,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:11:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:24,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:11:24,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:11:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:11:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:11:25,019 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:11:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-22 13:11:25,019 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-22 13:11:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:11:25,019 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:11:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:11:25,019 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:11:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:11:25,020 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:11:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:11:25,020 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:11:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:11:25,020 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:11:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:11:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:11:25,021 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:11:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:11:25,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:11:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:11:25,021 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:11:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:11:25,022 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:11:25,207 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:11:25,209 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:11:25,902 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:11:25,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:11:25,912 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-22 13:11:25,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:11:25 BoogieIcfgContainer [2021-12-22 13:11:25,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:11:25,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:11:25,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:11:25,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:11:25,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:11:24" (1/3) ... [2021-12-22 13:11:25,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64aebb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:11:25, skipping insertion in model container [2021-12-22 13:11:25,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:24" (2/3) ... [2021-12-22 13:11:25,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64aebb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:11:25, skipping insertion in model container [2021-12-22 13:11:25,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:11:25" (3/3) ... [2021-12-22 13:11:25,923 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-22 13:11:25,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:11:25,928 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:11:25,972 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:11:25,978 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:11:25,979 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:11:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-22 13:11:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 13:11:26,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:26,017 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] [2021-12-22 13:11:26,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:26,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1248240687, now seen corresponding path program 1 times [2021-12-22 13:11:26,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:26,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179911242] [2021-12-22 13:11:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:26,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:26,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:26,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 13:11:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:26,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:26,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179911242] [2021-12-22 13:11:26,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179911242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:26,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:26,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:26,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940442507] [2021-12-22 13:11:26,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:26,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:26,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:26,408 INFO L87 Difference]: Start difference. First operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 13:11:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:26,750 INFO L93 Difference]: Finished difference Result 919 states and 1492 transitions. [2021-12-22 13:11:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-22 13:11:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:26,768 INFO L225 Difference]: With dead ends: 919 [2021-12-22 13:11:26,768 INFO L226 Difference]: Without dead ends: 496 [2021-12-22 13:11:26,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:26,778 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 897 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:26,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1082 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:11:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-22 13:11:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 490. [2021-12-22 13:11:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 440 states have (on average 1.5318181818181817) internal successors, (674), 445 states have internal predecessors, (674), 37 states have call successors, (37), 12 states have call predecessors, (37), 11 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-22 13:11:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 750 transitions. [2021-12-22 13:11:26,866 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 750 transitions. Word has length 44 [2021-12-22 13:11:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:26,867 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 750 transitions. [2021-12-22 13:11:26,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 13:11:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 750 transitions. [2021-12-22 13:11:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:11:26,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:26,872 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] [2021-12-22 13:11:26,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:11:26,873 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:26,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1131267963, now seen corresponding path program 1 times [2021-12-22 13:11:26,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:26,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387911100] [2021-12-22 13:11:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:26,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:26,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:26,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:11:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:26,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:26,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387911100] [2021-12-22 13:11:26,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387911100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:26,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:26,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:26,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954210555] [2021-12-22 13:11:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:26,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:26,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:26,959 INFO L87 Difference]: Start difference. First operand 490 states and 750 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 13:11:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:27,423 INFO L93 Difference]: Finished difference Result 738 states and 1090 transitions. [2021-12-22 13:11:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-22 13:11:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:27,436 INFO L225 Difference]: With dead ends: 738 [2021-12-22 13:11:27,438 INFO L226 Difference]: Without dead ends: 614 [2021-12-22 13:11:27,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:27,444 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 349 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:27,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1427 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:11:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-22 13:11:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 557. [2021-12-22 13:11:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 501 states have (on average 1.5129740518962076) internal successors, (758), 506 states have internal predecessors, (758), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-12-22 13:11:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 840 transitions. [2021-12-22 13:11:27,512 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 840 transitions. Word has length 45 [2021-12-22 13:11:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:27,512 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 840 transitions. [2021-12-22 13:11:27,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 13:11:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 840 transitions. [2021-12-22 13:11:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:11:27,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:27,515 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] [2021-12-22 13:11:27,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:11:27,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1879341872, now seen corresponding path program 1 times [2021-12-22 13:11:27,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:27,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738736665] [2021-12-22 13:11:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:27,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:27,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:27,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:11:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:27,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738736665] [2021-12-22 13:11:27,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738736665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:27,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:27,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:27,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199712767] [2021-12-22 13:11:27,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:27,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:27,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:27,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:27,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:27,627 INFO L87 Difference]: Start difference. First operand 557 states and 840 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 13:11:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:27,802 INFO L93 Difference]: Finished difference Result 965 states and 1399 transitions. [2021-12-22 13:11:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-22 13:11:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:27,807 INFO L225 Difference]: With dead ends: 965 [2021-12-22 13:11:27,808 INFO L226 Difference]: Without dead ends: 774 [2021-12-22 13:11:27,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:27,810 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 906 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:27,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 1085 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:11:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-22 13:11:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 722. [2021-12-22 13:11:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 647 states have (on average 1.465224111282844) internal successors, (948), 655 states have internal predecessors, (948), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (59), 45 states have call predecessors, (59), 47 states have call successors, (59) [2021-12-22 13:11:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1058 transitions. [2021-12-22 13:11:27,847 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1058 transitions. Word has length 45 [2021-12-22 13:11:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:27,848 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1058 transitions. [2021-12-22 13:11:27,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 13:11:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1058 transitions. [2021-12-22 13:11:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 13:11:27,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:27,859 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:11:27,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:11:27,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:27,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2075143713, now seen corresponding path program 1 times [2021-12-22 13:11:27,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:27,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342977314] [2021-12-22 13:11:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:27,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:27,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:11:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:27,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:11:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:11:27,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:27,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342977314] [2021-12-22 13:11:27,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342977314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:27,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:27,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:27,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926021083] [2021-12-22 13:11:27,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:27,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:27,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:27,978 INFO L87 Difference]: Start difference. First operand 722 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 13:11:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:28,428 INFO L93 Difference]: Finished difference Result 1306 states and 1843 transitions. [2021-12-22 13:11:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-22 13:11:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:28,434 INFO L225 Difference]: With dead ends: 1306 [2021-12-22 13:11:28,434 INFO L226 Difference]: Without dead ends: 950 [2021-12-22 13:11:28,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:28,436 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 333 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:28,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 1455 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:11:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-12-22 13:11:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 912. [2021-12-22 13:11:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 813 states have (on average 1.4120541205412054) internal successors, (1148), 823 states have internal predecessors, (1148), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (83), 59 states have call predecessors, (83), 61 states have call successors, (83) [2021-12-22 13:11:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1296 transitions. [2021-12-22 13:11:28,486 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1296 transitions. Word has length 62 [2021-12-22 13:11:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:28,488 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1296 transitions. [2021-12-22 13:11:28,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 13:11:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1296 transitions. [2021-12-22 13:11:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 13:11:28,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:28,492 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:11:28,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:11:28,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1252852542, now seen corresponding path program 1 times [2021-12-22 13:11:28,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:28,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067641969] [2021-12-22 13:11:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:28,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:11:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:11:28,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067641969] [2021-12-22 13:11:28,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067641969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:28,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:28,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:28,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296374323] [2021-12-22 13:11:28,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:28,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:28,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:28,557 INFO L87 Difference]: Start difference. First operand 912 states and 1296 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 13:11:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:28,723 INFO L93 Difference]: Finished difference Result 1565 states and 2149 transitions. [2021-12-22 13:11:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:28,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-22 13:11:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:28,729 INFO L225 Difference]: With dead ends: 1565 [2021-12-22 13:11:28,729 INFO L226 Difference]: Without dead ends: 1111 [2021-12-22 13:11:28,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:28,732 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 893 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:28,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1082 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:11:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-12-22 13:11:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1056. [2021-12-22 13:11:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 941 states have (on average 1.3804463336875665) internal successors, (1299), 953 states have internal predecessors, (1299), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (97), 67 states have call predecessors, (97), 69 states have call successors, (97) [2021-12-22 13:11:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1469 transitions. [2021-12-22 13:11:28,774 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1469 transitions. Word has length 67 [2021-12-22 13:11:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:28,775 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1469 transitions. [2021-12-22 13:11:28,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 13:11:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1469 transitions. [2021-12-22 13:11:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:11:28,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:28,777 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:11:28,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:11:28,778 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1281985013, now seen corresponding path program 1 times [2021-12-22 13:11:28,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:28,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266774399] [2021-12-22 13:11:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:28,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:11:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:11:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:11:28,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:28,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266774399] [2021-12-22 13:11:28,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266774399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383708667] [2021-12-22 13:11:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:28,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:28,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:28,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:11:28,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:11:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:11:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:11:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:11:29,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:11:29,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383708667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:29,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:11:29,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:11:29,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899804008] [2021-12-22 13:11:29,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:29,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:11:29,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:11:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:29,170 INFO L87 Difference]: Start difference. First operand 1056 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 13:11:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:29,238 INFO L93 Difference]: Finished difference Result 1599 states and 2192 transitions. [2021-12-22 13:11:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:11:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-12-22 13:11:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:29,244 INFO L225 Difference]: With dead ends: 1599 [2021-12-22 13:11:29,244 INFO L226 Difference]: Without dead ends: 1054 [2021-12-22 13:11:29,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:29,247 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 72 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:29,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1340 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:11:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-22 13:11:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1010. [2021-12-22 13:11:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 901 states have (on average 1.3695893451720311) internal successors, (1234), 913 states have internal predecessors, (1234), 69 states have call successors, (69), 34 states have call predecessors, (69), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2021-12-22 13:11:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1394 transitions. [2021-12-22 13:11:29,290 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1394 transitions. Word has length 68 [2021-12-22 13:11:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:29,291 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1394 transitions. [2021-12-22 13:11:29,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 13:11:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1394 transitions. [2021-12-22 13:11:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:11:29,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:29,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:29,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:11:29,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 13:11:29,519 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 897986762, now seen corresponding path program 1 times [2021-12-22 13:11:29,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:29,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71434701] [2021-12-22 13:11:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:29,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:29,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:29,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:11:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:11:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:11:29,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71434701] [2021-12-22 13:11:29,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71434701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25423963] [2021-12-22 13:11:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:29,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:29,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:11:29,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:11:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:11:29,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:11:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:29,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:11:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:11:30,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25423963] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:30,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:11:30,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-22 13:11:30,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749326113] [2021-12-22 13:11:30,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:30,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:30,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:11:30,015 INFO L87 Difference]: Start difference. First operand 1010 states and 1394 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 13:11:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:30,165 INFO L93 Difference]: Finished difference Result 1062 states and 1456 transitions. [2021-12-22 13:11:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:11:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-22 13:11:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:30,171 INFO L225 Difference]: With dead ends: 1062 [2021-12-22 13:11:30,171 INFO L226 Difference]: Without dead ends: 1059 [2021-12-22 13:11:30,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:11:30,175 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 1197 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:30,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 746 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:11:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-12-22 13:11:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1009. [2021-12-22 13:11:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 901 states have (on average 1.367369589345172) internal successors, (1232), 912 states have internal predecessors, (1232), 68 states have call successors, (68), 34 states have call predecessors, (68), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2021-12-22 13:11:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1391 transitions. [2021-12-22 13:11:30,225 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1391 transitions. Word has length 68 [2021-12-22 13:11:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:30,225 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1391 transitions. [2021-12-22 13:11:30,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 13:11:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1391 transitions. [2021-12-22 13:11:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:11:30,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:30,228 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:11:30,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:11:30,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-22 13:11:30,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2066438309, now seen corresponding path program 1 times [2021-12-22 13:11:30,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:30,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883707939] [2021-12-22 13:11:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:30,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:30,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:11:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:30,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:11:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:11:30,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883707939] [2021-12-22 13:11:30,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883707939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195760156] [2021-12-22 13:11:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:30,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:30,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:30,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:11:30,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:11:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:30,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:11:30,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:11:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:31,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:11:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:11:31,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195760156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:11:31,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:11:31,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-22 13:11:31,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285152643] [2021-12-22 13:11:31,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:11:31,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:11:31,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:11:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:31,149 INFO L87 Difference]: Start difference. First operand 1009 states and 1391 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-22 13:11:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:32,516 INFO L93 Difference]: Finished difference Result 2519 states and 3329 transitions. [2021-12-22 13:11:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:11:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-22 13:11:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:32,525 INFO L225 Difference]: With dead ends: 2519 [2021-12-22 13:11:32,525 INFO L226 Difference]: Without dead ends: 2023 [2021-12-22 13:11:32,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 13:11:32,528 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 1813 mSDsluCounter, 2901 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:32,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1845 Valid, 3683 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:11:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-12-22 13:11:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1388. [2021-12-22 13:11:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1241 states have (on average 1.3247381144238517) internal successors, (1644), 1260 states have internal predecessors, (1644), 88 states have call successors, (88), 48 states have call predecessors, (88), 57 states have return successors, (125), 80 states have call predecessors, (125), 85 states have call successors, (125) [2021-12-22 13:11:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1857 transitions. [2021-12-22 13:11:32,619 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1857 transitions. Word has length 69 [2021-12-22 13:11:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 1857 transitions. [2021-12-22 13:11:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-22 13:11:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1857 transitions. [2021-12-22 13:11:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 13:11:32,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:32,623 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 13:11:32,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:11:32,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:32,840 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1048564289, now seen corresponding path program 1 times [2021-12-22 13:11:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506534603] [2021-12-22 13:11:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:32,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:32,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:32,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:11:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:32,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:11:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:32,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:11:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 13:11:32,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506534603] [2021-12-22 13:11:32,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506534603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780099904] [2021-12-22 13:11:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:32,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:32,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:11:32,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:11:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:11:33,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:11:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:11:33,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:11:33,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780099904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:33,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:11:33,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:11:33,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285253908] [2021-12-22 13:11:33,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:33,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:11:33,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:11:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:33,180 INFO L87 Difference]: Start difference. First operand 1388 states and 1857 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 13:11:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:33,265 INFO L93 Difference]: Finished difference Result 2079 states and 2732 transitions. [2021-12-22 13:11:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:11:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-22 13:11:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:33,273 INFO L225 Difference]: With dead ends: 2079 [2021-12-22 13:11:33,273 INFO L226 Difference]: Without dead ends: 1310 [2021-12-22 13:11:33,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:33,278 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 617 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:33,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 761 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:11:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-22 13:11:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1301. [2021-12-22 13:11:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1164 states have (on average 1.3230240549828178) internal successors, (1540), 1182 states have internal predecessors, (1540), 84 states have call successors, (84), 44 states have call predecessors, (84), 51 states have return successors, (117), 75 states have call predecessors, (117), 81 states have call successors, (117) [2021-12-22 13:11:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1741 transitions. [2021-12-22 13:11:33,347 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1741 transitions. Word has length 88 [2021-12-22 13:11:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:33,349 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1741 transitions. [2021-12-22 13:11:33,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 13:11:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1741 transitions. [2021-12-22 13:11:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 13:11:33,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:33,353 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 13:11:33,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:11:33,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:33,576 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:33,577 INFO L85 PathProgramCache]: Analyzing trace with hash -55924099, now seen corresponding path program 1 times [2021-12-22 13:11:33,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:33,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981979047] [2021-12-22 13:11:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:33,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:11:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:11:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:11:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:11:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 13:11:33,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:33,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981979047] [2021-12-22 13:11:33,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981979047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614987350] [2021-12-22 13:11:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:33,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:33,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:33,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:11:33,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:11:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:33,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:11:33,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:11:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:11:33,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:11:33,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614987350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:33,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:11:33,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:11:33,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216813006] [2021-12-22 13:11:33,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:33,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:11:33,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:33,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:11:33,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:33,925 INFO L87 Difference]: Start difference. First operand 1301 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 13:11:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:33,985 INFO L93 Difference]: Finished difference Result 1678 states and 2202 transitions. [2021-12-22 13:11:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:11:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-22 13:11:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:33,988 INFO L225 Difference]: With dead ends: 1678 [2021-12-22 13:11:33,988 INFO L226 Difference]: Without dead ends: 360 [2021-12-22 13:11:33,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:33,991 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 61 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:33,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1335 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:11:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-22 13:11:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-12-22 13:11:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5797546012269938) internal successors, (515), 328 states have internal predecessors, (515), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 13:11:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 567 transitions. [2021-12-22 13:11:34,003 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 567 transitions. Word has length 103 [2021-12-22 13:11:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:34,004 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 567 transitions. [2021-12-22 13:11:34,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 13:11:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 567 transitions. [2021-12-22 13:11:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:34,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:34,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:11:34,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 13:11:34,232 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:34,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1801318745, now seen corresponding path program 1 times [2021-12-22 13:11:34,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:34,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724561051] [2021-12-22 13:11:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:34,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:34,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:34,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:34,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:34,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:34,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724561051] [2021-12-22 13:11:34,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724561051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:34,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:34,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:11:34,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991448348] [2021-12-22 13:11:34,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:34,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:11:34,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:11:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:34,377 INFO L87 Difference]: Start difference. First operand 360 states and 567 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:35,526 INFO L93 Difference]: Finished difference Result 841 states and 1345 transitions. [2021-12-22 13:11:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:11:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:35,529 INFO L225 Difference]: With dead ends: 841 [2021-12-22 13:11:35,529 INFO L226 Difference]: Without dead ends: 491 [2021-12-22 13:11:35,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:11:35,531 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 966 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:35,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1026 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:11:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-22 13:11:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2021-12-22 13:11:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5766871165644172) internal successors, (514), 328 states have internal predecessors, (514), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 13:11:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 566 transitions. [2021-12-22 13:11:35,560 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 566 transitions. Word has length 168 [2021-12-22 13:11:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:35,561 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 566 transitions. [2021-12-22 13:11:35,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 566 transitions. [2021-12-22 13:11:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:35,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:35,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:35,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:11:35,563 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2146146907, now seen corresponding path program 1 times [2021-12-22 13:11:35,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68491614] [2021-12-22 13:11:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:35,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:35,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:35,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:35,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:35,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68491614] [2021-12-22 13:11:35,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68491614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:35,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:35,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:11:35,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619633572] [2021-12-22 13:11:35,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:35,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:11:35,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:35,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:11:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:35,689 INFO L87 Difference]: Start difference. First operand 360 states and 566 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:36,837 INFO L93 Difference]: Finished difference Result 833 states and 1328 transitions. [2021-12-22 13:11:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:11:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:36,842 INFO L225 Difference]: With dead ends: 833 [2021-12-22 13:11:36,842 INFO L226 Difference]: Without dead ends: 491 [2021-12-22 13:11:36,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:11:36,844 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 957 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:36,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 1024 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:11:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-22 13:11:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2021-12-22 13:11:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5736196319018405) internal successors, (513), 328 states have internal predecessors, (513), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 13:11:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 565 transitions. [2021-12-22 13:11:36,871 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 565 transitions. Word has length 168 [2021-12-22 13:11:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:36,871 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 565 transitions. [2021-12-22 13:11:36,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 565 transitions. [2021-12-22 13:11:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:36,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:36,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:11:36,874 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1762957987, now seen corresponding path program 1 times [2021-12-22 13:11:36,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:36,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755496482] [2021-12-22 13:11:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:36,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:36,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:36,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:36,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:37,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:37,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:37,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:37,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755496482] [2021-12-22 13:11:37,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755496482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:37,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:37,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:11:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934532472] [2021-12-22 13:11:37,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:37,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:11:37,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:11:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:11:37,027 INFO L87 Difference]: Start difference. First operand 360 states and 565 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:39,346 INFO L93 Difference]: Finished difference Result 1318 states and 2116 transitions. [2021-12-22 13:11:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:11:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:39,353 INFO L225 Difference]: With dead ends: 1318 [2021-12-22 13:11:39,353 INFO L226 Difference]: Without dead ends: 978 [2021-12-22 13:11:39,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:39,355 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 1456 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:39,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1474 Valid, 1647 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 13:11:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-12-22 13:11:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 715. [2021-12-22 13:11:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 654 states have (on average 1.5871559633027523) internal successors, (1038), 657 states have internal predecessors, (1038), 47 states have call successors, (47), 13 states have call predecessors, (47), 13 states have return successors, (48), 45 states have call predecessors, (48), 45 states have call successors, (48) [2021-12-22 13:11:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1133 transitions. [2021-12-22 13:11:39,399 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1133 transitions. Word has length 168 [2021-12-22 13:11:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:39,399 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1133 transitions. [2021-12-22 13:11:39,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1133 transitions. [2021-12-22 13:11:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:39,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:39,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:39,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:11:39,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1609608801, now seen corresponding path program 1 times [2021-12-22 13:11:39,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:39,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237012126] [2021-12-22 13:11:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:39,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:39,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:39,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:39,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:39,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:39,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:39,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237012126] [2021-12-22 13:11:39,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237012126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:39,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:39,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:39,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177276598] [2021-12-22 13:11:39,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:39,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:39,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:39,553 INFO L87 Difference]: Start difference. First operand 715 states and 1133 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:42,195 INFO L93 Difference]: Finished difference Result 2178 states and 3507 transitions. [2021-12-22 13:11:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:11:42,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:42,204 INFO L225 Difference]: With dead ends: 2178 [2021-12-22 13:11:42,204 INFO L226 Difference]: Without dead ends: 1483 [2021-12-22 13:11:42,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:11:42,208 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 1483 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:42,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 2847 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 13:11:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-12-22 13:11:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1046. [2021-12-22 13:11:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.581419624217119) internal successors, (1515), 962 states have internal predecessors, (1515), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-22 13:11:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1652 transitions. [2021-12-22 13:11:42,277 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1652 transitions. Word has length 168 [2021-12-22 13:11:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1652 transitions. [2021-12-22 13:11:42,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1652 transitions. [2021-12-22 13:11:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:42,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:42,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:42,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:11:42,280 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1271321251, now seen corresponding path program 1 times [2021-12-22 13:11:42,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:42,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002722347] [2021-12-22 13:11:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:42,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:42,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:42,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:42,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:42,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:42,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:42,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002722347] [2021-12-22 13:11:42,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002722347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:42,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:42,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:42,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122183903] [2021-12-22 13:11:42,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:42,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:42,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:42,401 INFO L87 Difference]: Start difference. First operand 1046 states and 1652 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:43,838 INFO L93 Difference]: Finished difference Result 2523 states and 4060 transitions. [2021-12-22 13:11:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:11:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:43,845 INFO L225 Difference]: With dead ends: 2523 [2021-12-22 13:11:43,845 INFO L226 Difference]: Without dead ends: 1497 [2021-12-22 13:11:43,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:43,849 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1050 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:43,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 1514 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:11:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-12-22 13:11:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1046. [2021-12-22 13:11:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.5782881002087683) internal successors, (1512), 962 states have internal predecessors, (1512), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-22 13:11:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1649 transitions. [2021-12-22 13:11:43,950 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1649 transitions. Word has length 168 [2021-12-22 13:11:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:43,950 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1649 transitions. [2021-12-22 13:11:43,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1649 transitions. [2021-12-22 13:11:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:43,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:43,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:43,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:11:43,953 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:43,953 INFO L85 PathProgramCache]: Analyzing trace with hash -844766753, now seen corresponding path program 1 times [2021-12-22 13:11:43,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:43,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055494485] [2021-12-22 13:11:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:43,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:44,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:44,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:44,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:44,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:44,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055494485] [2021-12-22 13:11:44,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055494485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:44,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:44,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:44,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882455326] [2021-12-22 13:11:44,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:44,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:44,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:44,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:44,108 INFO L87 Difference]: Start difference. First operand 1046 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:45,454 INFO L93 Difference]: Finished difference Result 2519 states and 4043 transitions. [2021-12-22 13:11:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:11:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:45,460 INFO L225 Difference]: With dead ends: 2519 [2021-12-22 13:11:45,460 INFO L226 Difference]: Without dead ends: 1493 [2021-12-22 13:11:45,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:45,463 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 1281 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:45,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 1279 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:11:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-12-22 13:11:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1046. [2021-12-22 13:11:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.5751565762004176) internal successors, (1509), 962 states have internal predecessors, (1509), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-22 13:11:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1646 transitions. [2021-12-22 13:11:45,544 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1646 transitions. Word has length 168 [2021-12-22 13:11:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:45,545 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1646 transitions. [2021-12-22 13:11:45,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1646 transitions. [2021-12-22 13:11:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:45,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:45,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:45,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:11:45,547 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1385196259, now seen corresponding path program 1 times [2021-12-22 13:11:45,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472524349] [2021-12-22 13:11:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:45,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:45,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:45,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:45,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:45,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:45,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:45,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472524349] [2021-12-22 13:11:45,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472524349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:45,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:45,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:45,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107328109] [2021-12-22 13:11:45,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:45,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:45,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:45,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:45,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:45,686 INFO L87 Difference]: Start difference. First operand 1046 states and 1646 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:48,380 INFO L93 Difference]: Finished difference Result 3436 states and 5490 transitions. [2021-12-22 13:11:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:11:48,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:48,389 INFO L225 Difference]: With dead ends: 3436 [2021-12-22 13:11:48,389 INFO L226 Difference]: Without dead ends: 2410 [2021-12-22 13:11:48,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:11:48,393 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 1465 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2797 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:48,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1483 Valid, 2824 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2797 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 13:11:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-12-22 13:11:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1717. [2021-12-22 13:11:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1575 states have (on average 1.5695238095238095) internal successors, (2472), 1581 states have internal predecessors, (2472), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-22 13:11:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2697 transitions. [2021-12-22 13:11:48,544 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2697 transitions. Word has length 168 [2021-12-22 13:11:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:48,544 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2697 transitions. [2021-12-22 13:11:48,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2697 transitions. [2021-12-22 13:11:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:48,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:48,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:48,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:11:48,547 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1541176801, now seen corresponding path program 1 times [2021-12-22 13:11:48,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:48,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921281358] [2021-12-22 13:11:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:48,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:48,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:48,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:48,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:48,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:48,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:48,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921281358] [2021-12-22 13:11:48,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921281358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:48,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:48,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:48,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877611722] [2021-12-22 13:11:48,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:48,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:48,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:48,670 INFO L87 Difference]: Start difference. First operand 1717 states and 2697 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:50,108 INFO L93 Difference]: Finished difference Result 4093 states and 6528 transitions. [2021-12-22 13:11:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:11:50,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:50,117 INFO L225 Difference]: With dead ends: 4093 [2021-12-22 13:11:50,118 INFO L226 Difference]: Without dead ends: 2396 [2021-12-22 13:11:50,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:50,124 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 1047 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:50,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1503 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:11:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-12-22 13:11:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1717. [2021-12-22 13:11:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1575 states have (on average 1.5663492063492064) internal successors, (2467), 1581 states have internal predecessors, (2467), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-22 13:11:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2692 transitions. [2021-12-22 13:11:50,288 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2692 transitions. Word has length 168 [2021-12-22 13:11:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:50,289 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2692 transitions. [2021-12-22 13:11:50,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2692 transitions. [2021-12-22 13:11:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:50,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:50,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:50,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:11:50,295 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1130566435, now seen corresponding path program 1 times [2021-12-22 13:11:50,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:50,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294034031] [2021-12-22 13:11:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:50,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:50,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:50,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:50,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:50,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:50,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:50,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294034031] [2021-12-22 13:11:50,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294034031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:50,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:50,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:50,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786099364] [2021-12-22 13:11:50,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:50,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:50,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:50,437 INFO L87 Difference]: Start difference. First operand 1717 states and 2692 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:53,363 INFO L93 Difference]: Finished difference Result 5875 states and 9325 transitions. [2021-12-22 13:11:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:11:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:53,379 INFO L225 Difference]: With dead ends: 5875 [2021-12-22 13:11:53,379 INFO L226 Difference]: Without dead ends: 4178 [2021-12-22 13:11:53,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:11:53,384 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 1457 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2770 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:53,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1475 Valid, 2813 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2770 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 13:11:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-12-22 13:11:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3063. [2021-12-22 13:11:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.560966939210807) internal successors, (4391), 2823 states have internal predecessors, (4391), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-22 13:11:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4798 transitions. [2021-12-22 13:11:53,689 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4798 transitions. Word has length 168 [2021-12-22 13:11:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:53,689 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4798 transitions. [2021-12-22 13:11:53,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4798 transitions. [2021-12-22 13:11:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:53,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:53,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:53,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:11:53,693 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1376531039, now seen corresponding path program 1 times [2021-12-22 13:11:53,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:53,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513738242] [2021-12-22 13:11:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:53,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:53,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:53,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:53,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:53,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:53,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513738242] [2021-12-22 13:11:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513738242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:53,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:53,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:53,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794257013] [2021-12-22 13:11:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:53,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:53,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:53,841 INFO L87 Difference]: Start difference. First operand 3063 states and 4798 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:55,188 INFO L93 Difference]: Finished difference Result 7237 states and 11491 transitions. [2021-12-22 13:11:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:11:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:55,204 INFO L225 Difference]: With dead ends: 7237 [2021-12-22 13:11:55,204 INFO L226 Difference]: Without dead ends: 4194 [2021-12-22 13:11:55,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:55,212 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1204 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:55,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 1304 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:11:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-12-22 13:11:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3063. [2021-12-22 13:11:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.557767507998578) internal successors, (4382), 2823 states have internal predecessors, (4382), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-22 13:11:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4789 transitions. [2021-12-22 13:11:55,527 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4789 transitions. Word has length 168 [2021-12-22 13:11:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:55,527 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4789 transitions. [2021-12-22 13:11:55,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4789 transitions. [2021-12-22 13:11:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:55,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:55,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:55,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:11:55,530 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash -759352163, now seen corresponding path program 1 times [2021-12-22 13:11:55,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477478530] [2021-12-22 13:11:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:55,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:55,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:55,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477478530] [2021-12-22 13:11:55,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477478530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:55,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:55,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052905839] [2021-12-22 13:11:55,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:55,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:55,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:55,659 INFO L87 Difference]: Start difference. First operand 3063 states and 4789 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:57,245 INFO L93 Difference]: Finished difference Result 7217 states and 11424 transitions. [2021-12-22 13:11:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:11:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:57,261 INFO L225 Difference]: With dead ends: 7217 [2021-12-22 13:11:57,261 INFO L226 Difference]: Without dead ends: 4174 [2021-12-22 13:11:57,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:57,270 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 1045 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:57,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 1488 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:11:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4174 states. [2021-12-22 13:11:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4174 to 3063. [2021-12-22 13:11:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.554568076786349) internal successors, (4373), 2823 states have internal predecessors, (4373), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-22 13:11:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4780 transitions. [2021-12-22 13:11:57,542 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4780 transitions. Word has length 168 [2021-12-22 13:11:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:57,543 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4780 transitions. [2021-12-22 13:11:57,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4780 transitions. [2021-12-22 13:11:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:57,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:57,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:57,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:11:57,547 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash -341463461, now seen corresponding path program 1 times [2021-12-22 13:11:57,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:57,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409843104] [2021-12-22 13:11:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:57,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:57,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:57,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409843104] [2021-12-22 13:11:57,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409843104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:57,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:57,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:57,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257618256] [2021-12-22 13:11:57,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:57,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:57,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:57,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:57,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:57,670 INFO L87 Difference]: Start difference. First operand 3063 states and 4780 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:59,272 INFO L93 Difference]: Finished difference Result 7207 states and 11377 transitions. [2021-12-22 13:11:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:11:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:11:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:59,288 INFO L225 Difference]: With dead ends: 7207 [2021-12-22 13:11:59,288 INFO L226 Difference]: Without dead ends: 4164 [2021-12-22 13:11:59,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:59,297 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1043 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:59,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 1484 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:11:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-12-22 13:11:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 3063. [2021-12-22 13:11:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.5513686455741202) internal successors, (4364), 2823 states have internal predecessors, (4364), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-22 13:11:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4771 transitions. [2021-12-22 13:11:59,636 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4771 transitions. Word has length 168 [2021-12-22 13:11:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:59,636 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4771 transitions. [2021-12-22 13:11:59,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:11:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4771 transitions. [2021-12-22 13:11:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:11:59,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:59,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:59,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:11:59,639 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:59,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1057490141, now seen corresponding path program 1 times [2021-12-22 13:11:59,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:59,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924567676] [2021-12-22 13:11:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:59,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:59,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:59,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:59,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:11:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:11:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:59,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924567676] [2021-12-22 13:11:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924567676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:59,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:59,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:59,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744238040] [2021-12-22 13:11:59,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:59,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:59,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:59,765 INFO L87 Difference]: Start difference. First operand 3063 states and 4771 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:01,352 INFO L93 Difference]: Finished difference Result 7197 states and 11330 transitions. [2021-12-22 13:12:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:12:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:01,363 INFO L225 Difference]: With dead ends: 7197 [2021-12-22 13:12:01,363 INFO L226 Difference]: Without dead ends: 4154 [2021-12-22 13:12:01,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:01,370 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1085 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:01,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 1453 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-12-22 13:12:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3063. [2021-12-22 13:12:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.5481692143618913) internal successors, (4355), 2823 states have internal predecessors, (4355), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-22 13:12:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4762 transitions. [2021-12-22 13:12:01,679 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4762 transitions. Word has length 168 [2021-12-22 13:12:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:01,679 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4762 transitions. [2021-12-22 13:12:01,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4762 transitions. [2021-12-22 13:12:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:12:01,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:01,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:01,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:12:01,682 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash -559950309, now seen corresponding path program 1 times [2021-12-22 13:12:01,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595380685] [2021-12-22 13:12:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:01,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:12:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:12:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:12:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:12:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:01,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595380685] [2021-12-22 13:12:01,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595380685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:01,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:01,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:01,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504584898] [2021-12-22 13:12:01,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:01,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:01,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:01,848 INFO L87 Difference]: Start difference. First operand 3063 states and 4762 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:05,710 INFO L93 Difference]: Finished difference Result 11921 states and 18647 transitions. [2021-12-22 13:12:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:12:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:12:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:05,737 INFO L225 Difference]: With dead ends: 11921 [2021-12-22 13:12:05,737 INFO L226 Difference]: Without dead ends: 8878 [2021-12-22 13:12:05,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:05,747 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 1529 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 3260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:05,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 2936 Invalid, 3260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3169 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 13:12:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8878 states. [2021-12-22 13:12:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8878 to 5701. [2021-12-22 13:12:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 5243 states have (on average 1.5401487697882892) internal successors, (8075), 5261 states have internal predecessors, (8075), 339 states have call successors, (339), 103 states have call predecessors, (339), 118 states have return successors, (434), 352 states have call predecessors, (434), 337 states have call successors, (434) [2021-12-22 13:12:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 8848 transitions. [2021-12-22 13:12:06,338 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 8848 transitions. Word has length 168 [2021-12-22 13:12:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:06,338 INFO L470 AbstractCegarLoop]: Abstraction has 5701 states and 8848 transitions. [2021-12-22 13:12:06,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 8848 transitions. [2021-12-22 13:12:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:12:06,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:06,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:12:06,343 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash -196483811, now seen corresponding path program 1 times [2021-12-22 13:12:06,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:06,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958735801] [2021-12-22 13:12:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:06,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:06,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:12:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:06,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:12:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:12:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:06,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:12:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:06,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:06,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958735801] [2021-12-22 13:12:06,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958735801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:06,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:06,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:06,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908850972] [2021-12-22 13:12:06,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:06,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:06,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:06,479 INFO L87 Difference]: Start difference. First operand 5701 states and 8848 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:11,431 INFO L93 Difference]: Finished difference Result 22389 states and 34987 transitions. [2021-12-22 13:12:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:12:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2021-12-22 13:12:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:11,487 INFO L225 Difference]: With dead ends: 22389 [2021-12-22 13:12:11,487 INFO L226 Difference]: Without dead ends: 16708 [2021-12-22 13:12:11,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:11,506 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1795 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 2658 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1825 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:11,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1825 Valid, 2763 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2658 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 13:12:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2021-12-22 13:12:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 11038. [2021-12-22 13:12:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 10172 states have (on average 1.5380456154148643) internal successors, (15645), 10206 states have internal predecessors, (15645), 635 states have call successors, (635), 199 states have call predecessors, (635), 230 states have return successors, (908), 664 states have call predecessors, (908), 633 states have call successors, (908) [2021-12-22 13:12:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 17188 transitions. [2021-12-22 13:12:12,759 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 17188 transitions. Word has length 168 [2021-12-22 13:12:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:12,759 INFO L470 AbstractCegarLoop]: Abstraction has 11038 states and 17188 transitions. [2021-12-22 13:12:12,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 17188 transitions. [2021-12-22 13:12:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-22 13:12:12,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:12,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:12,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:12:12,766 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 92335579, now seen corresponding path program 1 times [2021-12-22 13:12:12,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:12,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970003607] [2021-12-22 13:12:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:12,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:12:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:12:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:12:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:12:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:12,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:12,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970003607] [2021-12-22 13:12:12,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970003607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:12,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:12,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:12,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908704915] [2021-12-22 13:12:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:12,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:12,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:12,902 INFO L87 Difference]: Start difference. First operand 11038 states and 17188 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)