./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.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 0c76345a7418e3e3e542d36688efe541ee3690f4974296017bb3a3a18fafce6e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:17:11,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:17:11,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:17:11,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:17:11,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:17:11,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:17:11,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:17:11,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:17:11,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:17:11,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:17:11,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:17:11,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:17:11,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:17:11,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:17:11,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:17:11,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:17:11,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:17:11,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:17:11,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:17:11,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:17:11,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:17:11,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:17:11,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:17:11,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:17:11,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:17:11,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:17:11,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:17:11,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:17:11,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:17:11,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:17:11,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:17:11,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:17:11,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:17:11,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:17:11,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:17:11,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:17:11,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:17:11,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:17:11,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:17:11,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:17:11,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:17:11,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:17:11,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:17:11,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:17:11,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:17:11,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:17:11,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:17:11,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:17:11,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:17:11,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:17:11,984 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:17:11,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:17:11,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:17:11,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:17:11,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:17:11,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:17:11,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:17:11,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:17:11,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:17:11,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:17:11,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:17:11,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:17:11,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:17:11,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:17:11,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:17:11,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:17:11,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:17:11,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:17:11,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:17:11,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:17:11,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:17:11,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:17:11,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:17:11,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:17:11,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:17:11,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:17:11,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c76345a7418e3e3e542d36688efe541ee3690f4974296017bb3a3a18fafce6e [2021-12-14 16:17:12,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:17:12,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:17:12,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:17:12,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:17:12,248 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:17:12,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-1.c [2021-12-14 16:17:12,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60d09b39/3fa5df19221246e6a90864fbf8323f70/FLAG700494f86 [2021-12-14 16:17:12,739 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:17:12,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-1.c [2021-12-14 16:17:12,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60d09b39/3fa5df19221246e6a90864fbf8323f70/FLAG700494f86 [2021-12-14 16:17:13,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60d09b39/3fa5df19221246e6a90864fbf8323f70 [2021-12-14 16:17:13,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:17:13,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:17:13,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:17:13,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:17:13,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:17:13,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3cd577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13, skipping insertion in model container [2021-12-14 16:17:13,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:17:13,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:17:13,326 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.13.cil-1.c[913,926] [2021-12-14 16:17:13,384 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.13.cil-1.c[5977,5990] [2021-12-14 16:17:13,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:17:13,523 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:17:13,537 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.13.cil-1.c[913,926] [2021-12-14 16:17:13,561 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.13.cil-1.c[5977,5990] [2021-12-14 16:17:13,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:17:13,634 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:17:13,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13 WrapperNode [2021-12-14 16:17:13,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:17:13,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:17:13,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:17:13,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:17:13,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,738 INFO L137 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1118 [2021-12-14 16:17:13,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:17:13,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:17:13,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:17:13,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:17:13,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:17:13,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:17:13,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:17:13,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:17:13,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (1/1) ... [2021-12-14 16:17:13,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:17:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:13,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:17:13,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:17:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:17:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:17:13,911 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:17:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:17:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:17:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:17:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:17:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:17:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:17:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:17:13,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:17:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:17:13,914 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:17:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:17:13,914 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:17:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:17:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:17:13,915 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:17:13,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:17:13,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:17:13,915 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:17:13,915 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:17:13,915 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-14 16:17:13,916 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-14 16:17:14,102 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:17:14,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:17:14,846 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:17:14,856 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:17:14,856 INFO L301 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-14 16:17:14,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:17:14 BoogieIcfgContainer [2021-12-14 16:17:14,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:17:14,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:17:14,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:17:14,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:17:14,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:17:13" (1/3) ... [2021-12-14 16:17:14,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aab1b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:17:14, skipping insertion in model container [2021-12-14 16:17:14,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:13" (2/3) ... [2021-12-14 16:17:14,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aab1b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:17:14, skipping insertion in model container [2021-12-14 16:17:14,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:17:14" (3/3) ... [2021-12-14 16:17:14,866 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.13.cil-1.c [2021-12-14 16:17:14,871 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:17:14,871 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:17:14,912 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:17:14,917 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:17:14,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:17:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 487 states, 439 states have (on average 1.6560364464692483) internal successors, (727), 446 states have internal predecessors, (727), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-14 16:17:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:17:14,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:14,947 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] [2021-12-14 16:17:14,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash 657340763, now seen corresponding path program 1 times [2021-12-14 16:17:14,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:14,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574905640] [2021-12-14 16:17:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:14,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:15,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:17:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:15,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:15,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574905640] [2021-12-14 16:17:15,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574905640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:15,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:15,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:15,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133918986] [2021-12-14 16:17:15,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:15,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:15,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:15,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:15,291 INFO L87 Difference]: Start difference. First operand has 487 states, 439 states have (on average 1.6560364464692483) internal successors, (727), 446 states have internal predecessors, (727), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 16:17:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:15,795 INFO L93 Difference]: Finished difference Result 955 states and 1559 transitions. [2021-12-14 16:17:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:15,798 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), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-14 16:17:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:15,824 INFO L225 Difference]: With dead ends: 955 [2021-12-14 16:17:15,824 INFO L226 Difference]: Without dead ends: 485 [2021-12-14 16:17:15,832 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 [2021-12-14 16:17:15,836 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 407 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1482 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:17:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-14 16:17:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 476. [2021-12-14 16:17:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 431 states have (on average 1.5638051044083527) internal successors, (674), 435 states have internal predecessors, (674), 35 states have call successors, (35), 10 states have call predecessors, (35), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-14 16:17:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 740 transitions. [2021-12-14 16:17:15,934 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 740 transitions. Word has length 44 [2021-12-14 16:17:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:15,934 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 740 transitions. [2021-12-14 16:17:15,935 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), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 16:17:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 740 transitions. [2021-12-14 16:17:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:17:15,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:15,938 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] [2021-12-14 16:17:15,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:17:15,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1792259367, now seen corresponding path program 1 times [2021-12-14 16:17:15,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:15,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849812547] [2021-12-14 16:17:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:15,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:17:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:16,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:16,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849812547] [2021-12-14 16:17:16,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849812547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:16,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:16,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:16,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723520170] [2021-12-14 16:17:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:16,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:16,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:16,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:16,046 INFO L87 Difference]: Start difference. First operand 476 states and 740 transitions. 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) [2021-12-14 16:17:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:16,253 INFO L93 Difference]: Finished difference Result 608 states and 925 transitions. [2021-12-14 16:17:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:16,254 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 [2021-12-14 16:17:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:16,257 INFO L225 Difference]: With dead ends: 608 [2021-12-14 16:17:16,258 INFO L226 Difference]: Without dead ends: 546 [2021-12-14 16:17:16,267 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 [2021-12-14 16:17:16,268 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1008 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:16,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1177 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:17:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-14 16:17:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 540. [2021-12-14 16:17:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 488 states have (on average 1.5368852459016393) internal successors, (750), 493 states have internal predecessors, (750), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-14 16:17:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 830 transitions. [2021-12-14 16:17:16,305 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 830 transitions. Word has length 44 [2021-12-14 16:17:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:16,306 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 830 transitions. [2021-12-14 16:17:16,306 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) [2021-12-14 16:17:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 830 transitions. [2021-12-14 16:17:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:17:16,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:16,315 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] [2021-12-14 16:17:16,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:17:16,316 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1280815605, now seen corresponding path program 1 times [2021-12-14 16:17:16,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:16,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298653251] [2021-12-14 16:17:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:16,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:17:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:16,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:16,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298653251] [2021-12-14 16:17:16,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298653251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:16,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:16,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:16,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286910610] [2021-12-14 16:17:16,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:16,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:16,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:16,442 INFO L87 Difference]: Start difference. First operand 540 states and 830 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) [2021-12-14 16:17:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:16,858 INFO L93 Difference]: Finished difference Result 788 states and 1170 transitions. [2021-12-14 16:17:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:16,858 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 [2021-12-14 16:17:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:16,862 INFO L225 Difference]: With dead ends: 788 [2021-12-14 16:17:16,862 INFO L226 Difference]: Without dead ends: 664 [2021-12-14 16:17:16,863 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 [2021-12-14 16:17:16,864 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 388 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:16,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1588 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:17:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-14 16:17:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 607. [2021-12-14 16:17:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 549 states have (on average 1.5191256830601092) internal successors, (834), 554 states have internal predecessors, (834), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (44), 38 states have call predecessors, (44), 38 states have call successors, (44) [2021-12-14 16:17:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 920 transitions. [2021-12-14 16:17:16,890 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 920 transitions. Word has length 45 [2021-12-14 16:17:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:16,890 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 920 transitions. [2021-12-14 16:17:16,890 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) [2021-12-14 16:17:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 920 transitions. [2021-12-14 16:17:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:17:16,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:16,892 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] [2021-12-14 16:17:16,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:17:16,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -3541856, now seen corresponding path program 1 times [2021-12-14 16:17:16,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:16,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843195001] [2021-12-14 16:17:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:16,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:17:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:16,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843195001] [2021-12-14 16:17:16,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843195001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:16,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:16,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:16,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849876599] [2021-12-14 16:17:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:16,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:16,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:16,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:16,943 INFO L87 Difference]: Start difference. First operand 607 states and 920 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) [2021-12-14 16:17:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:17,142 INFO L93 Difference]: Finished difference Result 1015 states and 1479 transitions. [2021-12-14 16:17:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:17,143 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 [2021-12-14 16:17:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:17,148 INFO L225 Difference]: With dead ends: 1015 [2021-12-14 16:17:17,148 INFO L226 Difference]: Without dead ends: 824 [2021-12-14 16:17:17,149 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 [2021-12-14 16:17:17,156 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 1025 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:17,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1052 Valid, 1204 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:17:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-12-14 16:17:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 772. [2021-12-14 16:17:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 695 states have (on average 1.4733812949640288) internal successors, (1024), 703 states have internal predecessors, (1024), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (61), 47 states have call predecessors, (61), 49 states have call successors, (61) [2021-12-14 16:17:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1138 transitions. [2021-12-14 16:17:17,199 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1138 transitions. Word has length 45 [2021-12-14 16:17:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:17,200 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 1138 transitions. [2021-12-14 16:17:17,200 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) [2021-12-14 16:17:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1138 transitions. [2021-12-14 16:17:17,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:17:17,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:17,203 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] [2021-12-14 16:17:17,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:17:17,204 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1415426807, now seen corresponding path program 1 times [2021-12-14 16:17:17,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:17,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354299316] [2021-12-14 16:17:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:17,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:17:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:17:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:17:17,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:17,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354299316] [2021-12-14 16:17:17,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354299316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:17,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:17,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:17,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595274188] [2021-12-14 16:17:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:17,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:17,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:17,311 INFO L87 Difference]: Start difference. First operand 772 states and 1138 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) [2021-12-14 16:17:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:17,781 INFO L93 Difference]: Finished difference Result 1116 states and 1599 transitions. [2021-12-14 16:17:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:17,782 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 [2021-12-14 16:17:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:17,788 INFO L225 Difference]: With dead ends: 1116 [2021-12-14 16:17:17,789 INFO L226 Difference]: Without dead ends: 879 [2021-12-14 16:17:17,789 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 [2021-12-14 16:17:17,790 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 372 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:17,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1612 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:17:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-12-14 16:17:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 841. [2021-12-14 16:17:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 755 states have (on average 1.4490066225165563) internal successors, (1094), 764 states have internal predecessors, (1094), 58 states have call successors, (58), 25 states have call predecessors, (58), 26 states have return successors, (70), 52 states have call predecessors, (70), 54 states have call successors, (70) [2021-12-14 16:17:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1222 transitions. [2021-12-14 16:17:17,832 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1222 transitions. Word has length 62 [2021-12-14 16:17:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:17,833 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1222 transitions. [2021-12-14 16:17:17,833 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) [2021-12-14 16:17:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1222 transitions. [2021-12-14 16:17:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:17:17,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:17,835 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] [2021-12-14 16:17:17,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:17:17,836 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash -558830938, now seen corresponding path program 1 times [2021-12-14 16:17:17,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:17,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467992125] [2021-12-14 16:17:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:17,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:17:17,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:17,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467992125] [2021-12-14 16:17:17,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467992125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:17,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:17,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:17,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405891134] [2021-12-14 16:17:17,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:17,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:17,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:17,890 INFO L87 Difference]: Start difference. First operand 841 states and 1222 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) [2021-12-14 16:17:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:18,069 INFO L93 Difference]: Finished difference Result 1392 states and 1944 transitions. [2021-12-14 16:17:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:18,070 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 [2021-12-14 16:17:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:18,074 INFO L225 Difference]: With dead ends: 1392 [2021-12-14 16:17:18,074 INFO L226 Difference]: Without dead ends: 1014 [2021-12-14 16:17:18,075 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 [2021-12-14 16:17:18,076 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1012 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:18,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 1201 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:17:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-12-14 16:17:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 959. [2021-12-14 16:17:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 860 states have (on average 1.4186046511627908) internal successors, (1220), 870 states have internal predecessors, (1220), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (81), 59 states have call predecessors, (81), 61 states have call successors, (81) [2021-12-14 16:17:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1366 transitions. [2021-12-14 16:17:18,115 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1366 transitions. Word has length 67 [2021-12-14 16:17:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:18,115 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1366 transitions. [2021-12-14 16:17:18,115 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) [2021-12-14 16:17:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1366 transitions. [2021-12-14 16:17:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:17:18,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:18,117 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] [2021-12-14 16:17:18,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:17:18,117 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1719872919, now seen corresponding path program 1 times [2021-12-14 16:17:18,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:18,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407523649] [2021-12-14 16:17:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:18,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:17:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:17:18,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:18,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407523649] [2021-12-14 16:17:18,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407523649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:18,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707301584] [2021-12-14 16:17:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:18,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:18,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:18,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:17:18,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:17:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:17:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:17:18,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:17:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707301584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:18,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:17:18,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:17:18,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000077364] [2021-12-14 16:17:18,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:18,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:17:18,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:17:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:18,488 INFO L87 Difference]: Start difference. First operand 959 states and 1366 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) [2021-12-14 16:17:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:18,533 INFO L93 Difference]: Finished difference Result 1402 states and 1961 transitions. [2021-12-14 16:17:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:17:18,534 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 [2021-12-14 16:17:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:18,538 INFO L225 Difference]: With dead ends: 1402 [2021-12-14 16:17:18,538 INFO L226 Difference]: Without dead ends: 957 [2021-12-14 16:17:18,540 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 [2021-12-14 16:17:18,540 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 72 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1502 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 [2021-12-14 16:17:18,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1502 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:17:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-12-14 16:17:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 913. [2021-12-14 16:17:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 820 states have (on average 1.4121951219512194) internal successors, (1158), 830 states have internal predecessors, (1158), 61 states have call successors, (61), 28 states have call predecessors, (61), 30 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2021-12-14 16:17:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1294 transitions. [2021-12-14 16:17:18,593 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1294 transitions. Word has length 68 [2021-12-14 16:17:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:18,594 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1294 transitions. [2021-12-14 16:17:18,594 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) [2021-12-14 16:17:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1294 transitions. [2021-12-14 16:17:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:17:18,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:18,596 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] [2021-12-14 16:17:18,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:18,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:18,822 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 460098856, now seen corresponding path program 1 times [2021-12-14 16:17:18,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061571947] [2021-12-14 16:17:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:18,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:17:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:17:18,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061571947] [2021-12-14 16:17:18,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061571947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:18,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907095868] [2021-12-14 16:17:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:18,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:18,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:18,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:17:18,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:17:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:17:19,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:19,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:17:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:17:19,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907095868] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:19,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:17:19,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:17:19,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153319282] [2021-12-14 16:17:19,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:19,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:19,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:17:19,348 INFO L87 Difference]: Start difference. First operand 913 states and 1294 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) [2021-12-14 16:17:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:19,516 INFO L93 Difference]: Finished difference Result 964 states and 1355 transitions. [2021-12-14 16:17:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:17:19,516 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 [2021-12-14 16:17:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:19,521 INFO L225 Difference]: With dead ends: 964 [2021-12-14 16:17:19,521 INFO L226 Difference]: Without dead ends: 961 [2021-12-14 16:17:19,521 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 [2021-12-14 16:17:19,522 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1351 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:19,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 827 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:17:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-12-14 16:17:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 912. [2021-12-14 16:17:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 820 states have (on average 1.4097560975609755) internal successors, (1156), 829 states have internal predecessors, (1156), 60 states have call successors, (60), 28 states have call predecessors, (60), 30 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2021-12-14 16:17:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1291 transitions. [2021-12-14 16:17:19,572 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1291 transitions. Word has length 68 [2021-12-14 16:17:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:19,572 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1291 transitions. [2021-12-14 16:17:19,572 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) [2021-12-14 16:17:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1291 transitions. [2021-12-14 16:17:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:17:19,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:19,574 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] [2021-12-14 16:17:19,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:19,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-14 16:17:19,796 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1376668361, now seen corresponding path program 1 times [2021-12-14 16:17:19,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:19,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638409899] [2021-12-14 16:17:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:19,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:17:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:17:19,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:19,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638409899] [2021-12-14 16:17:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638409899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524097302] [2021-12-14 16:17:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:19,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:19,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:17:19,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:17:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:17:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:20,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:17:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:17:20,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524097302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:17:20,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:17:20,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:17:20,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687319694] [2021-12-14 16:17:20,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:17:20,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:17:20,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:17:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:20,492 INFO L87 Difference]: Start difference. First operand 912 states and 1291 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) [2021-12-14 16:17:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:22,035 INFO L93 Difference]: Finished difference Result 2253 states and 3014 transitions. [2021-12-14 16:17:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:17:22,036 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 [2021-12-14 16:17:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:22,043 INFO L225 Difference]: With dead ends: 2253 [2021-12-14 16:17:22,043 INFO L226 Difference]: Without dead ends: 1857 [2021-12-14 16:17:22,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:17:22,045 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 2009 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 3999 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:22,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2043 Valid, 3999 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:17:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-12-14 16:17:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1276. [2021-12-14 16:17:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1148 states have (on average 1.3562717770034842) internal successors, (1557), 1163 states have internal predecessors, (1557), 79 states have call successors, (79), 41 states have call predecessors, (79), 47 states have return successors, (106), 72 states have call predecessors, (106), 76 states have call successors, (106) [2021-12-14 16:17:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1742 transitions. [2021-12-14 16:17:22,103 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1742 transitions. Word has length 69 [2021-12-14 16:17:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:22,104 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1742 transitions. [2021-12-14 16:17:22,104 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) [2021-12-14 16:17:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1742 transitions. [2021-12-14 16:17:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:17:22,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:22,106 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] [2021-12-14 16:17:22,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:22,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:22,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1823241683, now seen corresponding path program 1 times [2021-12-14 16:17:22,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:22,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393258875] [2021-12-14 16:17:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:22,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:22,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:22,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:22,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:17:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:22,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:17:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:17:22,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393258875] [2021-12-14 16:17:22,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393258875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470804853] [2021-12-14 16:17:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:22,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:22,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:17:22,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:17:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:17:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:17:22,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:17:22,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470804853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:22,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:17:22,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:17:22,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566397942] [2021-12-14 16:17:22,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:22,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:17:22,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:22,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:17:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:22,720 INFO L87 Difference]: Start difference. First operand 1276 states and 1742 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) [2021-12-14 16:17:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:22,771 INFO L93 Difference]: Finished difference Result 1888 states and 2520 transitions. [2021-12-14 16:17:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:17:22,772 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 [2021-12-14 16:17:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:22,777 INFO L225 Difference]: With dead ends: 1888 [2021-12-14 16:17:22,778 INFO L226 Difference]: Without dead ends: 1216 [2021-12-14 16:17:22,780 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 [2021-12-14 16:17:22,781 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 699 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 841 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 [2021-12-14 16:17:22,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 841 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:17:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-14 16:17:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1210. [2021-12-14 16:17:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1089 states have (on average 1.3535353535353536) internal successors, (1474), 1104 states have internal predecessors, (1474), 76 states have call successors, (76), 38 states have call predecessors, (76), 43 states have return successors, (101), 68 states have call predecessors, (101), 73 states have call successors, (101) [2021-12-14 16:17:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1651 transitions. [2021-12-14 16:17:22,838 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1651 transitions. Word has length 88 [2021-12-14 16:17:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:22,839 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1651 transitions. [2021-12-14 16:17:22,840 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) [2021-12-14 16:17:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1651 transitions. [2021-12-14 16:17:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:17:22,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:22,843 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] [2021-12-14 16:17:22,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:23,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:23,059 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash -418359059, now seen corresponding path program 1 times [2021-12-14 16:17:23,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583389836] [2021-12-14 16:17:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:23,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:17:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:17:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:17:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:17:23,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:23,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583389836] [2021-12-14 16:17:23,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583389836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:23,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581533502] [2021-12-14 16:17:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:23,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:23,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:23,144 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:17:23,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:17:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:17:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:17:23,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:17:23,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581533502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:23,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:17:23,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:17:23,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466794509] [2021-12-14 16:17:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:23,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:17:23,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:17:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:23,434 INFO L87 Difference]: Start difference. First operand 1210 states and 1651 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) [2021-12-14 16:17:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:23,493 INFO L93 Difference]: Finished difference Result 1520 states and 2032 transitions. [2021-12-14 16:17:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:17:23,494 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 [2021-12-14 16:17:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:23,496 INFO L225 Difference]: With dead ends: 1520 [2021-12-14 16:17:23,497 INFO L226 Difference]: Without dead ends: 410 [2021-12-14 16:17:23,499 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 [2021-12-14 16:17:23,499 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 60 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1496 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 [2021-12-14 16:17:23,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1496 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:17:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-14 16:17:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-12-14 16:17:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.585561497326203) internal successors, (593), 376 states have internal predecessors, (593), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 16:17:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 649 transitions. [2021-12-14 16:17:23,517 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 649 transitions. Word has length 103 [2021-12-14 16:17:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:23,517 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 649 transitions. [2021-12-14 16:17:23,518 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) [2021-12-14 16:17:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 649 transitions. [2021-12-14 16:17:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:23,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:23,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:23,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:23,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 16:17:23,732 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2055015172, now seen corresponding path program 1 times [2021-12-14 16:17:23,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855070097] [2021-12-14 16:17:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:23,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:23,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855070097] [2021-12-14 16:17:23,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855070097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:23,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:23,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:17:23,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288873640] [2021-12-14 16:17:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:23,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:17:23,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:17:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:17:23,893 INFO L87 Difference]: Start difference. First operand 410 states and 649 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-14 16:17:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:25,340 INFO L93 Difference]: Finished difference Result 964 states and 1549 transitions. [2021-12-14 16:17:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:17:25,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:25,344 INFO L225 Difference]: With dead ends: 964 [2021-12-14 16:17:25,344 INFO L226 Difference]: Without dead ends: 563 [2021-12-14 16:17:25,345 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 [2021-12-14 16:17:25,346 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1119 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:25,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 1170 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:17:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-14 16:17:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 410. [2021-12-14 16:17:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5828877005347595) internal successors, (592), 376 states have internal predecessors, (592), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 16:17:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 648 transitions. [2021-12-14 16:17:25,371 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 648 transitions. Word has length 190 [2021-12-14 16:17:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:25,371 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 648 transitions. [2021-12-14 16:17:25,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-14 16:17:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 648 transitions. [2021-12-14 16:17:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:25,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:25,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:25,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:17:25,374 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1767612478, now seen corresponding path program 1 times [2021-12-14 16:17:25,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:25,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475433989] [2021-12-14 16:17:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:25,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:25,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475433989] [2021-12-14 16:17:25,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475433989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:25,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:25,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:17:25,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70251750] [2021-12-14 16:17:25,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:25,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:17:25,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:17:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:17:25,508 INFO L87 Difference]: Start difference. First operand 410 states and 648 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-14 16:17:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:26,856 INFO L93 Difference]: Finished difference Result 956 states and 1532 transitions. [2021-12-14 16:17:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:17:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:26,860 INFO L225 Difference]: With dead ends: 956 [2021-12-14 16:17:26,860 INFO L226 Difference]: Without dead ends: 563 [2021-12-14 16:17:26,861 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 [2021-12-14 16:17:26,862 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1110 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:26,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1168 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:17:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-14 16:17:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 410. [2021-12-14 16:17:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5802139037433156) internal successors, (591), 376 states have internal predecessors, (591), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 16:17:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 647 transitions. [2021-12-14 16:17:26,887 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 647 transitions. Word has length 190 [2021-12-14 16:17:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:26,888 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 647 transitions. [2021-12-14 16:17:26,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-14 16:17:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 647 transitions. [2021-12-14 16:17:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:26,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:26,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:26,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:17:26,890 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1158894208, now seen corresponding path program 1 times [2021-12-14 16:17:26,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:26,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215706770] [2021-12-14 16:17:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:26,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:26,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:26,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:27,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:27,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:27,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:27,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215706770] [2021-12-14 16:17:27,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215706770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:27,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:27,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:17:27,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276366721] [2021-12-14 16:17:27,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:27,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:17:27,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:27,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:17:27,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:17:27,044 INFO L87 Difference]: Start difference. First operand 410 states and 647 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-14 16:17:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:29,927 INFO L93 Difference]: Finished difference Result 1512 states and 2438 transitions. [2021-12-14 16:17:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:17:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:29,932 INFO L225 Difference]: With dead ends: 1512 [2021-12-14 16:17:29,933 INFO L226 Difference]: Without dead ends: 1124 [2021-12-14 16:17:29,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:29,935 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 1683 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:29,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1703 Valid, 1881 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 16:17:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-12-14 16:17:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 817. [2021-12-14 16:17:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 752 states have (on average 1.5930851063829787) internal successors, (1198), 755 states have internal predecessors, (1198), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (52), 49 states have call predecessors, (52), 49 states have call successors, (52) [2021-12-14 16:17:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1301 transitions. [2021-12-14 16:17:29,989 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1301 transitions. Word has length 190 [2021-12-14 16:17:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:29,989 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1301 transitions. [2021-12-14 16:17:29,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-14 16:17:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1301 transitions. [2021-12-14 16:17:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:29,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:29,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:29,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:17:29,992 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash -650115394, now seen corresponding path program 1 times [2021-12-14 16:17:29,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:29,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017191000] [2021-12-14 16:17:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:29,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:30,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:30,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017191000] [2021-12-14 16:17:30,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017191000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:30,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:30,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:30,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453229316] [2021-12-14 16:17:30,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:30,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:30,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:30,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:30,157 INFO L87 Difference]: Start difference. First operand 817 states and 1301 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:33,553 INFO L93 Difference]: Finished difference Result 2500 states and 4041 transitions. [2021-12-14 16:17:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:33,561 INFO L225 Difference]: With dead ends: 2500 [2021-12-14 16:17:33,561 INFO L226 Difference]: Without dead ends: 1705 [2021-12-14 16:17:33,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:33,567 INFO L933 BasicCegarLoop]: 1105 mSDtfsCounter, 1714 mSDsluCounter, 2154 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:33,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1734 Valid, 3259 Invalid, 3382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 16:17:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-12-14 16:17:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1195. [2021-12-14 16:17:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1101 states have (on average 1.586739327883742) internal successors, (1747), 1105 states have internal predecessors, (1747), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-14 16:17:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1896 transitions. [2021-12-14 16:17:33,653 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1896 transitions. Word has length 190 [2021-12-14 16:17:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:33,654 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1896 transitions. [2021-12-14 16:17:33,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1896 transitions. [2021-12-14 16:17:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:33,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:33,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:33,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:17:33,656 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:33,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1721601472, now seen corresponding path program 1 times [2021-12-14 16:17:33,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:33,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199657558] [2021-12-14 16:17:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:33,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:33,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:33,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199657558] [2021-12-14 16:17:33,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199657558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:33,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:33,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:33,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517037491] [2021-12-14 16:17:33,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:33,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:33,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:33,854 INFO L87 Difference]: Start difference. First operand 1195 states and 1896 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:35,478 INFO L93 Difference]: Finished difference Result 2898 states and 4684 transitions. [2021-12-14 16:17:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:35,485 INFO L225 Difference]: With dead ends: 2898 [2021-12-14 16:17:35,486 INFO L226 Difference]: Without dead ends: 1725 [2021-12-14 16:17:35,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:35,489 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1392 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:35,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1413 Valid, 1525 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:17:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-12-14 16:17:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1195. [2021-12-14 16:17:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1101 states have (on average 1.5840145322434152) internal successors, (1744), 1105 states have internal predecessors, (1744), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-14 16:17:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1893 transitions. [2021-12-14 16:17:35,576 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1893 transitions. Word has length 190 [2021-12-14 16:17:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:35,577 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1893 transitions. [2021-12-14 16:17:35,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1893 transitions. [2021-12-14 16:17:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:35,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:35,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:35,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:17:35,580 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:35,580 INFO L85 PathProgramCache]: Analyzing trace with hash -3006850, now seen corresponding path program 1 times [2021-12-14 16:17:35,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:35,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629774079] [2021-12-14 16:17:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:35,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:35,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:35,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:35,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:35,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:35,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:35,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:35,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629774079] [2021-12-14 16:17:35,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629774079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:35,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:35,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:35,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021040296] [2021-12-14 16:17:35,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:35,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:35,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:35,750 INFO L87 Difference]: Start difference. First operand 1195 states and 1893 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:37,278 INFO L93 Difference]: Finished difference Result 2894 states and 4668 transitions. [2021-12-14 16:17:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:37,286 INFO L225 Difference]: With dead ends: 2894 [2021-12-14 16:17:37,286 INFO L226 Difference]: Without dead ends: 1721 [2021-12-14 16:17:37,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:37,290 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 1393 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:37,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 1519 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:17:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-12-14 16:17:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1195. [2021-12-14 16:17:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1101 states have (on average 1.581289736603088) internal successors, (1741), 1105 states have internal predecessors, (1741), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-14 16:17:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1890 transitions. [2021-12-14 16:17:37,389 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1890 transitions. Word has length 190 [2021-12-14 16:17:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1890 transitions. [2021-12-14 16:17:37,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1890 transitions. [2021-12-14 16:17:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:37,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:37,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:37,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:17:37,393 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash 495549952, now seen corresponding path program 1 times [2021-12-14 16:17:37,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:37,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564815110] [2021-12-14 16:17:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:37,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:37,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:37,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:37,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:37,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:37,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:37,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564815110] [2021-12-14 16:17:37,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564815110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:37,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:37,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:37,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699989385] [2021-12-14 16:17:37,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:37,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:37,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:37,542 INFO L87 Difference]: Start difference. First operand 1195 states and 1890 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:40,907 INFO L93 Difference]: Finished difference Result 3944 states and 6336 transitions. [2021-12-14 16:17:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:40,925 INFO L225 Difference]: With dead ends: 3944 [2021-12-14 16:17:40,925 INFO L226 Difference]: Without dead ends: 2771 [2021-12-14 16:17:40,931 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 [2021-12-14 16:17:40,932 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 1697 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 3229 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:40,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 3229 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3253 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:17:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-12-14 16:17:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1959. [2021-12-14 16:17:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1807 states have (on average 1.576092971776425) internal successors, (2848), 1813 states have internal predecessors, (2848), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2021-12-14 16:17:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3093 transitions. [2021-12-14 16:17:41,097 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3093 transitions. Word has length 190 [2021-12-14 16:17:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:41,098 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 3093 transitions. [2021-12-14 16:17:41,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3093 transitions. [2021-12-14 16:17:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:41,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:41,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:41,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:17:41,102 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:41,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1899419138, now seen corresponding path program 1 times [2021-12-14 16:17:41,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:41,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917812947] [2021-12-14 16:17:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:41,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:41,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:41,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917812947] [2021-12-14 16:17:41,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917812947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:41,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:41,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:41,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205541419] [2021-12-14 16:17:41,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:41,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:41,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:41,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:41,304 INFO L87 Difference]: Start difference. First operand 1959 states and 3093 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:43,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:43,141 INFO L93 Difference]: Finished difference Result 4694 states and 7526 transitions. [2021-12-14 16:17:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:43,152 INFO L225 Difference]: With dead ends: 4694 [2021-12-14 16:17:43,153 INFO L226 Difference]: Without dead ends: 2757 [2021-12-14 16:17:43,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:43,158 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1211 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:43,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 1726 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:17:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-12-14 16:17:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 1959. [2021-12-14 16:17:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1807 states have (on average 1.5733259546209186) internal successors, (2843), 1813 states have internal predecessors, (2843), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2021-12-14 16:17:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3088 transitions. [2021-12-14 16:17:43,321 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3088 transitions. Word has length 190 [2021-12-14 16:17:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:43,322 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 3088 transitions. [2021-12-14 16:17:43,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3088 transitions. [2021-12-14 16:17:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:43,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:43,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:43,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:17:43,325 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1113421248, now seen corresponding path program 1 times [2021-12-14 16:17:43,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:43,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217104791] [2021-12-14 16:17:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:43,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:43,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:43,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:43,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217104791] [2021-12-14 16:17:43,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217104791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:43,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:43,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:43,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947766510] [2021-12-14 16:17:43,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:43,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:43,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:43,522 INFO L87 Difference]: Start difference. First operand 1959 states and 3088 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:46,774 INFO L93 Difference]: Finished difference Result 6740 states and 10759 transitions. [2021-12-14 16:17:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:46,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:46,799 INFO L225 Difference]: With dead ends: 6740 [2021-12-14 16:17:46,800 INFO L226 Difference]: Without dead ends: 4803 [2021-12-14 16:17:46,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:46,809 INFO L933 BasicCegarLoop]: 1068 mSDtfsCounter, 1689 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:46,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 3218 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 16:17:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-12-14 16:17:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3489. [2021-12-14 16:17:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 3221 states have (on average 1.5681465383421298) internal successors, (5051), 3231 states have internal predecessors, (5051), 205 states have call successors, (205), 55 states have call predecessors, (205), 62 states have return successors, (238), 210 states have call predecessors, (238), 203 states have call successors, (238) [2021-12-14 16:17:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 5494 transitions. [2021-12-14 16:17:47,104 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 5494 transitions. Word has length 190 [2021-12-14 16:17:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:47,105 INFO L470 AbstractCegarLoop]: Abstraction has 3489 states and 5494 transitions. [2021-12-14 16:17:47,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 5494 transitions. [2021-12-14 16:17:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:47,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:47,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:47,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:17:47,108 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1780803138, now seen corresponding path program 1 times [2021-12-14 16:17:47,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:47,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480880331] [2021-12-14 16:17:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:47,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:47,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:47,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:47,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:47,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:47,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:47,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:47,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480880331] [2021-12-14 16:17:47,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480880331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:47,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:47,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:47,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622058755] [2021-12-14 16:17:47,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:47,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:47,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:47,260 INFO L87 Difference]: Start difference. First operand 3489 states and 5494 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:48,998 INFO L93 Difference]: Finished difference Result 8294 states and 13241 transitions. [2021-12-14 16:17:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:49,021 INFO L225 Difference]: With dead ends: 8294 [2021-12-14 16:17:49,022 INFO L226 Difference]: Without dead ends: 4827 [2021-12-14 16:17:49,031 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 [2021-12-14 16:17:49,032 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 1467 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:49,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1488 Valid, 1462 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:17:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2021-12-14 16:17:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 3489. [2021-12-14 16:17:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 3221 states have (on average 1.5653523750388079) internal successors, (5042), 3231 states have internal predecessors, (5042), 205 states have call successors, (205), 55 states have call predecessors, (205), 62 states have return successors, (238), 210 states have call predecessors, (238), 203 states have call successors, (238) [2021-12-14 16:17:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 5485 transitions. [2021-12-14 16:17:49,311 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 5485 transitions. Word has length 190 [2021-12-14 16:17:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:49,312 INFO L470 AbstractCegarLoop]: Abstraction has 3489 states and 5485 transitions. [2021-12-14 16:17:49,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 5485 transitions. [2021-12-14 16:17:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:49,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:49,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:49,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:17:49,316 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash -414425728, now seen corresponding path program 1 times [2021-12-14 16:17:49,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366247286] [2021-12-14 16:17:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:49,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:49,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366247286] [2021-12-14 16:17:49,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366247286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:49,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:49,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:49,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490164327] [2021-12-14 16:17:49,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:49,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:49,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:49,507 INFO L87 Difference]: Start difference. First operand 3489 states and 5485 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:53,019 INFO L93 Difference]: Finished difference Result 12330 states and 19599 transitions. [2021-12-14 16:17:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:53,052 INFO L225 Difference]: With dead ends: 12330 [2021-12-14 16:17:53,052 INFO L226 Difference]: Without dead ends: 8863 [2021-12-14 16:17:53,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:53,065 INFO L933 BasicCegarLoop]: 1057 mSDtfsCounter, 1681 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:53,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 3207 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 16:17:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8863 states. [2021-12-14 16:17:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8863 to 6563. [2021-12-14 16:17:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6563 states, 6063 states have (on average 1.5612732970476662) internal successors, (9466), 6081 states have internal predecessors, (9466), 381 states have call successors, (381), 103 states have call predecessors, (381), 118 states have return successors, (476), 394 states have call predecessors, (476), 379 states have call successors, (476) [2021-12-14 16:17:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6563 states to 6563 states and 10323 transitions. [2021-12-14 16:17:53,606 INFO L78 Accepts]: Start accepts. Automaton has 6563 states and 10323 transitions. Word has length 190 [2021-12-14 16:17:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:53,606 INFO L470 AbstractCegarLoop]: Abstraction has 6563 states and 10323 transitions. [2021-12-14 16:17:53,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6563 states and 10323 transitions. [2021-12-14 16:17:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:53,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:53,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:53,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:17:53,610 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:53,611 INFO L85 PathProgramCache]: Analyzing trace with hash -69597566, now seen corresponding path program 1 times [2021-12-14 16:17:53,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:53,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469624472] [2021-12-14 16:17:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:53,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:53,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:53,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:53,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:53,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:53,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:53,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469624472] [2021-12-14 16:17:53,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469624472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:53,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:53,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:53,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843768875] [2021-12-14 16:17:53,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:53,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:53,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:53,768 INFO L87 Difference]: Start difference. First operand 6563 states and 10323 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:57,992 INFO L93 Difference]: Finished difference Result 23530 states and 37419 transitions. [2021-12-14 16:17:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:57,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:17:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:58,052 INFO L225 Difference]: With dead ends: 23530 [2021-12-14 16:17:58,052 INFO L226 Difference]: Without dead ends: 16989 [2021-12-14 16:17:58,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:58,077 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 1680 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 3202 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:58,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 3202 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3191 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 16:17:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16989 states. [2021-12-14 16:17:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16989 to 12724. [2021-12-14 16:17:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12724 states, 11760 states have (on average 1.558843537414966) internal successors, (18332), 11794 states have internal predecessors, (18332), 733 states have call successors, (733), 199 states have call predecessors, (733), 230 states have return successors, (1006), 762 states have call predecessors, (1006), 731 states have call successors, (1006) [2021-12-14 16:17:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12724 states to 12724 states and 20071 transitions. [2021-12-14 16:17:59,162 INFO L78 Accepts]: Start accepts. Automaton has 12724 states and 20071 transitions. Word has length 190 [2021-12-14 16:17:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:59,162 INFO L470 AbstractCegarLoop]: Abstraction has 12724 states and 20071 transitions. [2021-12-14 16:17:59,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:17:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 12724 states and 20071 transitions. [2021-12-14 16:17:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:17:59,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:59,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:17:59,171 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash 911357248, now seen corresponding path program 1 times [2021-12-14 16:17:59,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:59,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750462202] [2021-12-14 16:17:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:59,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:59,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:59,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:59,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:17:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:59,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:17:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:59,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:17:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:59,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750462202] [2021-12-14 16:17:59,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750462202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:59,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:59,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:59,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778474192] [2021-12-14 16:17:59,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:59,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:59,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:59,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:59,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:59,331 INFO L87 Difference]: Start difference. First operand 12724 states and 20071 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-14 16:18:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:04,969 INFO L93 Difference]: Finished difference Result 45929 states and 73249 transitions. [2021-12-14 16:18:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:18:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:05,105 INFO L225 Difference]: With dead ends: 45929 [2021-12-14 16:18:05,105 INFO L226 Difference]: Without dead ends: 33227 [2021-12-14 16:18:05,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:05,147 INFO L933 BasicCegarLoop]: 1045 mSDtfsCounter, 1682 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3180 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:05,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 3195 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3180 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 16:18:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33227 states.