./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.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 a31ccbb50ed824a1b6eea67c3747e38f48ab93613ea1abf86baf8d129dc78945 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:12:19,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:12:19,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:12:20,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:12:20,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:12:20,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:12:20,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:12:20,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:12:20,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:12:20,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:12:20,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:12:20,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:12:20,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:12:20,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:12:20,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:12:20,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:12:20,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:12:20,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:12:20,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:12:20,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:12:20,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:12:20,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:12:20,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:12:20,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:12:20,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:12:20,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:12:20,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:12:20,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:12:20,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:12:20,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:12:20,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:12:20,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:12:20,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:12:20,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:12:20,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:12:20,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:12:20,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:12:20,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:12:20,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:12:20,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:12:20,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:12:20,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:12:20,108 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:12:20,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:12:20,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:12:20,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:12:20,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:12:20,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:12:20,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:12:20,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:12:20,122 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:12:20,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:12:20,123 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:12:20,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:12:20,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:12:20,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:12:20,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:12:20,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:12:20,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:12:20,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:12:20,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:12:20,125 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:12:20,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:12:20,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:12:20,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:12:20,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:12:20,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:12:20,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:12:20,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:12:20,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:12:20,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:12:20,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:12:20,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:12:20,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:12:20,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:12:20,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:12:20,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a31ccbb50ed824a1b6eea67c3747e38f48ab93613ea1abf86baf8d129dc78945 [2021-12-22 13:12:20,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:12:20,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:12:20,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:12:20,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:12:20,391 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:12:20,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2021-12-22 13:12:20,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/440ec67fc/9bec95b4a36440c6bc6b7ef125a4006a/FLAGe518da54f [2021-12-22 13:12:20,850 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:12:20,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2021-12-22 13:12:20,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/440ec67fc/9bec95b4a36440c6bc6b7ef125a4006a/FLAGe518da54f [2021-12-22 13:12:21,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/440ec67fc/9bec95b4a36440c6bc6b7ef125a4006a [2021-12-22 13:12:21,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:12:21,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:12:21,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:12:21,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:12:21,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:12:21,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19860575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21, skipping insertion in model container [2021-12-22 13:12:21,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:12:21,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:12:21,443 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_2.cil-1+token_ring.03.cil-1.c[914,927] [2021-12-22 13:12:21,499 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_2.cil-1+token_ring.03.cil-1.c[7115,7128] [2021-12-22 13:12:21,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:12:21,592 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:12:21,609 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_2.cil-1+token_ring.03.cil-1.c[914,927] [2021-12-22 13:12:21,635 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_2.cil-1+token_ring.03.cil-1.c[7115,7128] [2021-12-22 13:12:21,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:12:21,680 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:12:21,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21 WrapperNode [2021-12-22 13:12:21,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:12:21,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:12:21,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:12:21,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:12:21,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,749 INFO L137 Inliner]: procedures = 59, calls = 67, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 523 [2021-12-22 13:12:21,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:12:21,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:12:21,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:12:21,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:12:21,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:12:21,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:12:21,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:12:21,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:12:21,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (1/1) ... [2021-12-22 13:12:21,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:12:21,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:21,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:12:21,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:12:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:12:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:12:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:12:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:12:21,861 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:12:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:12:21,861 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:12:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:12:21,862 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:12:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:12:21,862 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:12:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:12:21,863 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:12:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:12:21,863 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:12:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:12:21,863 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:12:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:12:21,864 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:12:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:12:21,864 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:12:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:12:21,864 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:12:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:12:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:12:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:12:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:12:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:12:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:12:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:12:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:12:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:12:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:12:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:12:21,947 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:12:21,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:12:22,438 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:12:22,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:12:22,447 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-22 13:12:22,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:22 BoogieIcfgContainer [2021-12-22 13:12:22,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:12:22,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:12:22,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:12:22,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:12:22,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:12:21" (1/3) ... [2021-12-22 13:12:22,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444356f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:22, skipping insertion in model container [2021-12-22 13:12:22,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:21" (2/3) ... [2021-12-22 13:12:22,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444356f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:22, skipping insertion in model container [2021-12-22 13:12:22,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:22" (3/3) ... [2021-12-22 13:12:22,463 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2021-12-22 13:12:22,468 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:12:22,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:12:22,513 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:12:22,519 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:12:22,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:12:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 266 states, 215 states have (on average 1.5813953488372092) internal successors, (340), 223 states have internal predecessors, (340), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-22 13:12:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:22,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:22,553 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] [2021-12-22 13:12:22,554 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash 207768249, now seen corresponding path program 1 times [2021-12-22 13:12:22,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:22,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895619905] [2021-12-22 13:12:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:22,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:22,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:22,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895619905] [2021-12-22 13:12:22,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895619905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:22,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:22,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:22,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557192289] [2021-12-22 13:12:22,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:22,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:22,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:23,008 INFO L87 Difference]: Start difference. First operand has 266 states, 215 states have (on average 1.5813953488372092) internal successors, (340), 223 states have internal predecessors, (340), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:23,809 INFO L93 Difference]: Finished difference Result 647 states and 988 transitions. [2021-12-22 13:12:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:23,825 INFO L225 Difference]: With dead ends: 647 [2021-12-22 13:12:23,825 INFO L226 Difference]: Without dead ends: 390 [2021-12-22 13:12:23,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:23,833 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 668 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:23,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1144 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-22 13:12:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 351. [2021-12-22 13:12:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 283 states have (on average 1.459363957597173) internal successors, (413), 290 states have internal predecessors, (413), 44 states have call successors, (44), 22 states have call predecessors, (44), 22 states have return successors, (45), 41 states have call predecessors, (45), 40 states have call successors, (45) [2021-12-22 13:12:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 502 transitions. [2021-12-22 13:12:23,940 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 502 transitions. Word has length 65 [2021-12-22 13:12:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:23,941 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 502 transitions. [2021-12-22 13:12:23,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 502 transitions. [2021-12-22 13:12:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:23,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:23,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:23,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:12:23,952 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1886656889, now seen corresponding path program 1 times [2021-12-22 13:12:23,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:23,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780237490] [2021-12-22 13:12:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:23,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:24,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:24,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780237490] [2021-12-22 13:12:24,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780237490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:24,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:24,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:24,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068297777] [2021-12-22 13:12:24,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:24,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:24,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:24,088 INFO L87 Difference]: Start difference. First operand 351 states and 502 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:24,900 INFO L93 Difference]: Finished difference Result 698 states and 979 transitions. [2021-12-22 13:12:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:12:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:24,906 INFO L225 Difference]: With dead ends: 698 [2021-12-22 13:12:24,906 INFO L226 Difference]: Without dead ends: 521 [2021-12-22 13:12:24,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:12:24,908 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 697 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:24,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1599 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-22 13:12:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 447. [2021-12-22 13:12:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 359 states have (on average 1.4401114206128134) internal successors, (517), 368 states have internal predecessors, (517), 55 states have call successors, (55), 29 states have call predecessors, (55), 31 states have return successors, (64), 53 states have call predecessors, (64), 51 states have call successors, (64) [2021-12-22 13:12:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 636 transitions. [2021-12-22 13:12:24,939 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 636 transitions. Word has length 65 [2021-12-22 13:12:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:24,939 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 636 transitions. [2021-12-22 13:12:24,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 636 transitions. [2021-12-22 13:12:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:24,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:24,941 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] [2021-12-22 13:12:24,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:12:24,942 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash -141929221, now seen corresponding path program 1 times [2021-12-22 13:12:24,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571545143] [2021-12-22 13:12:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:24,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:25,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:25,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571545143] [2021-12-22 13:12:25,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571545143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:25,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:25,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:25,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307795971] [2021-12-22 13:12:25,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:25,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:25,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:25,114 INFO L87 Difference]: Start difference. First operand 447 states and 636 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:25,754 INFO L93 Difference]: Finished difference Result 748 states and 1050 transitions. [2021-12-22 13:12:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:25,755 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-22 13:12:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:25,759 INFO L225 Difference]: With dead ends: 748 [2021-12-22 13:12:25,759 INFO L226 Difference]: Without dead ends: 481 [2021-12-22 13:12:25,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:25,768 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 292 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:25,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1779 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-12-22 13:12:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 452. [2021-12-22 13:12:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 363 states have (on average 1.4297520661157024) internal successors, (519), 372 states have internal predecessors, (519), 55 states have call successors, (55), 29 states have call predecessors, (55), 32 states have return successors, (65), 54 states have call predecessors, (65), 51 states have call successors, (65) [2021-12-22 13:12:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 639 transitions. [2021-12-22 13:12:25,820 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 639 transitions. Word has length 65 [2021-12-22 13:12:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:25,822 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 639 transitions. [2021-12-22 13:12:25,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 639 transitions. [2021-12-22 13:12:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:25,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:25,825 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] [2021-12-22 13:12:25,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:12:25,826 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1171288519, now seen corresponding path program 1 times [2021-12-22 13:12:25,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:25,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577635872] [2021-12-22 13:12:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:25,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:25,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577635872] [2021-12-22 13:12:25,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577635872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:25,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:25,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:25,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864833610] [2021-12-22 13:12:25,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:25,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:25,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:25,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:25,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:25,975 INFO L87 Difference]: Start difference. First operand 452 states and 639 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:26,612 INFO L93 Difference]: Finished difference Result 770 states and 1072 transitions. [2021-12-22 13:12:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:12:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-22 13:12:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:26,618 INFO L225 Difference]: With dead ends: 770 [2021-12-22 13:12:26,619 INFO L226 Difference]: Without dead ends: 498 [2021-12-22 13:12:26,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:26,627 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 432 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:26,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1599 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-22 13:12:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 467. [2021-12-22 13:12:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 375 states have (on average 1.416) internal successors, (531), 384 states have internal predecessors, (531), 55 states have call successors, (55), 29 states have call predecessors, (55), 35 states have return successors, (68), 57 states have call predecessors, (68), 51 states have call successors, (68) [2021-12-22 13:12:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 654 transitions. [2021-12-22 13:12:26,663 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 654 transitions. Word has length 65 [2021-12-22 13:12:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:26,664 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 654 transitions. [2021-12-22 13:12:26,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 654 transitions. [2021-12-22 13:12:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:26,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:26,666 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] [2021-12-22 13:12:26,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:12:26,666 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash 214914875, now seen corresponding path program 1 times [2021-12-22 13:12:26,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:26,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037100912] [2021-12-22 13:12:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:26,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:26,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:26,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037100912] [2021-12-22 13:12:26,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037100912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:26,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:26,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:26,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927260993] [2021-12-22 13:12:26,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:26,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:26,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:26,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:26,790 INFO L87 Difference]: Start difference. First operand 467 states and 654 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:27,549 INFO L93 Difference]: Finished difference Result 859 states and 1165 transitions. [2021-12-22 13:12:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:12:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:27,553 INFO L225 Difference]: With dead ends: 859 [2021-12-22 13:12:27,554 INFO L226 Difference]: Without dead ends: 574 [2021-12-22 13:12:27,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:12:27,555 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 887 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:27,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 1178 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-12-22 13:12:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 479. [2021-12-22 13:12:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 385 states have (on average 1.405194805194805) internal successors, (541), 394 states have internal predecessors, (541), 56 states have call successors, (56), 30 states have call predecessors, (56), 36 states have return successors, (67), 58 states have call predecessors, (67), 52 states have call successors, (67) [2021-12-22 13:12:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 664 transitions. [2021-12-22 13:12:27,582 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 664 transitions. Word has length 65 [2021-12-22 13:12:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:27,582 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 664 transitions. [2021-12-22 13:12:27,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 664 transitions. [2021-12-22 13:12:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:27,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:27,584 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] [2021-12-22 13:12:27,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:12:27,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash 80901369, now seen corresponding path program 1 times [2021-12-22 13:12:27,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:27,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551462851] [2021-12-22 13:12:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:27,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:27,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:27,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551462851] [2021-12-22 13:12:27,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551462851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:27,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:27,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:27,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553919703] [2021-12-22 13:12:27,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:27,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:27,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:27,685 INFO L87 Difference]: Start difference. First operand 479 states and 664 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:28,037 INFO L93 Difference]: Finished difference Result 1121 states and 1511 transitions. [2021-12-22 13:12:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:12:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:28,043 INFO L225 Difference]: With dead ends: 1121 [2021-12-22 13:12:28,043 INFO L226 Difference]: Without dead ends: 825 [2021-12-22 13:12:28,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:12:28,045 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 1050 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:28,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1074 Valid, 731 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-22 13:12:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 769. [2021-12-22 13:12:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 609 states have (on average 1.3596059113300492) internal successors, (828), 625 states have internal predecessors, (828), 91 states have call successors, (91), 52 states have call predecessors, (91), 67 states have return successors, (124), 98 states have call predecessors, (124), 87 states have call successors, (124) [2021-12-22 13:12:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1043 transitions. [2021-12-22 13:12:28,094 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1043 transitions. Word has length 65 [2021-12-22 13:12:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:28,094 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 1043 transitions. [2021-12-22 13:12:28,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1043 transitions. [2021-12-22 13:12:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:12:28,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:28,097 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] [2021-12-22 13:12:28,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:12:28,097 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:28,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1103860140, now seen corresponding path program 1 times [2021-12-22 13:12:28,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:28,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543675322] [2021-12-22 13:12:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:28,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:28,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543675322] [2021-12-22 13:12:28,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543675322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:28,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:28,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:28,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693888672] [2021-12-22 13:12:28,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:28,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:28,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:28,175 INFO L87 Difference]: Start difference. First operand 769 states and 1043 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:28,578 INFO L93 Difference]: Finished difference Result 1972 states and 2614 transitions. [2021-12-22 13:12:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:28,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 13:12:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:28,587 INFO L225 Difference]: With dead ends: 1972 [2021-12-22 13:12:28,587 INFO L226 Difference]: Without dead ends: 1365 [2021-12-22 13:12:28,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:28,591 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 653 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:28,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 877 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-12-22 13:12:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1250. [2021-12-22 13:12:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 988 states have (on average 1.3248987854251013) internal successors, (1309), 1007 states have internal predecessors, (1309), 136 states have call successors, (136), 96 states have call predecessors, (136), 124 states have return successors, (196), 153 states have call predecessors, (196), 132 states have call successors, (196) [2021-12-22 13:12:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1641 transitions. [2021-12-22 13:12:28,643 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1641 transitions. Word has length 66 [2021-12-22 13:12:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:28,643 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1641 transitions. [2021-12-22 13:12:28,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:28,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1641 transitions. [2021-12-22 13:12:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:12:28,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:28,657 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] [2021-12-22 13:12:28,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:12:28,658 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash 354379519, now seen corresponding path program 1 times [2021-12-22 13:12:28,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:28,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231018768] [2021-12-22 13:12:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:28,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:28,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:28,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231018768] [2021-12-22 13:12:28,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231018768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:28,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:28,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:28,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340928964] [2021-12-22 13:12:28,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:28,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:28,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:28,743 INFO L87 Difference]: Start difference. First operand 1250 states and 1641 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:29,118 INFO L93 Difference]: Finished difference Result 3438 states and 4447 transitions. [2021-12-22 13:12:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 13:12:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:29,130 INFO L225 Difference]: With dead ends: 3438 [2021-12-22 13:12:29,130 INFO L226 Difference]: Without dead ends: 2370 [2021-12-22 13:12:29,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:12:29,134 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 873 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:29,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 738 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-12-22 13:12:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2112. [2021-12-22 13:12:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 1654 states have (on average 1.2914147521160821) internal successors, (2136), 1683 states have internal predecessors, (2136), 234 states have call successors, (234), 180 states have call predecessors, (234), 222 states have return successors, (332), 255 states have call predecessors, (332), 230 states have call successors, (332) [2021-12-22 13:12:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 2702 transitions. [2021-12-22 13:12:29,220 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 2702 transitions. Word has length 66 [2021-12-22 13:12:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:29,220 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 2702 transitions. [2021-12-22 13:12:29,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 2702 transitions. [2021-12-22 13:12:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 13:12:29,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:29,222 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] [2021-12-22 13:12:29,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:12:29,223 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1353227277, now seen corresponding path program 1 times [2021-12-22 13:12:29,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:29,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020931009] [2021-12-22 13:12:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:29,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:29,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020931009] [2021-12-22 13:12:29,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020931009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:29,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:29,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:29,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344736271] [2021-12-22 13:12:29,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:29,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:29,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:29,309 INFO L87 Difference]: Start difference. First operand 2112 states and 2702 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:29,675 INFO L93 Difference]: Finished difference Result 5022 states and 6352 transitions. [2021-12-22 13:12:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:29,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-22 13:12:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:29,689 INFO L225 Difference]: With dead ends: 5022 [2021-12-22 13:12:29,690 INFO L226 Difference]: Without dead ends: 3092 [2021-12-22 13:12:29,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:29,696 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 854 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:29,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 774 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-12-22 13:12:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 2844. [2021-12-22 13:12:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2222 states have (on average 1.278127812781278) internal successors, (2840), 2259 states have internal predecessors, (2840), 314 states have call successors, (314), 250 states have call predecessors, (314), 306 states have return successors, (441), 341 states have call predecessors, (441), 310 states have call successors, (441) [2021-12-22 13:12:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 3595 transitions. [2021-12-22 13:12:29,834 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 3595 transitions. Word has length 72 [2021-12-22 13:12:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:29,834 INFO L470 AbstractCegarLoop]: Abstraction has 2844 states and 3595 transitions. [2021-12-22 13:12:29,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 3595 transitions. [2021-12-22 13:12:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 13:12:29,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:29,837 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:29,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:12:29,837 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 483330199, now seen corresponding path program 1 times [2021-12-22 13:12:29,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144503112] [2021-12-22 13:12:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:29,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:29,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144503112] [2021-12-22 13:12:29,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144503112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:29,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:29,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:29,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960343572] [2021-12-22 13:12:29,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:29,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:29,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:29,922 INFO L87 Difference]: Start difference. First operand 2844 states and 3595 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:30,415 INFO L93 Difference]: Finished difference Result 3618 states and 4526 transitions. [2021-12-22 13:12:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-22 13:12:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:30,433 INFO L225 Difference]: With dead ends: 3618 [2021-12-22 13:12:30,433 INFO L226 Difference]: Without dead ends: 3615 [2021-12-22 13:12:30,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:12:30,436 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 1225 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:30,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 744 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:30,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-12-22 13:12:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3338. [2021-12-22 13:12:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2607 states have (on average 1.2704257767548908) internal successors, (3312), 2649 states have internal predecessors, (3312), 364 states have call successors, (364), 294 states have call predecessors, (364), 365 states have return successors, (520), 401 states have call predecessors, (520), 361 states have call successors, (520) [2021-12-22 13:12:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4196 transitions. [2021-12-22 13:12:30,624 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4196 transitions. Word has length 73 [2021-12-22 13:12:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:30,625 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 4196 transitions. [2021-12-22 13:12:30,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4196 transitions. [2021-12-22 13:12:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 13:12:30,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:30,627 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:30,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:12:30,628 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2097533117, now seen corresponding path program 1 times [2021-12-22 13:12:30,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:30,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857894292] [2021-12-22 13:12:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:30,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:30,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:30,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857894292] [2021-12-22 13:12:30,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857894292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:30,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219919751] [2021-12-22 13:12:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:30,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:30,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:12:30,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:12:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:12:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:12:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219919751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:12:31,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:12:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-22 13:12:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387395669] [2021-12-22 13:12:31,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:12:31,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:12:31,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:12:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:31,498 INFO L87 Difference]: Start difference. First operand 3338 states and 4196 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:12:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:32,888 INFO L93 Difference]: Finished difference Result 7779 states and 9682 transitions. [2021-12-22 13:12:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 13:12:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-22 13:12:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:32,922 INFO L225 Difference]: With dead ends: 7779 [2021-12-22 13:12:32,922 INFO L226 Difference]: Without dead ends: 7776 [2021-12-22 13:12:32,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-22 13:12:32,926 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1443 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:32,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1723 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:12:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-12-22 13:12:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 5128. [2021-12-22 13:12:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 4011 states have (on average 1.268511593118923) internal successors, (5088), 4075 states have internal predecessors, (5088), 548 states have call successors, (548), 452 states have call predecessors, (548), 567 states have return successors, (798), 607 states have call predecessors, (798), 545 states have call successors, (798) [2021-12-22 13:12:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 6434 transitions. [2021-12-22 13:12:33,285 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 6434 transitions. Word has length 74 [2021-12-22 13:12:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:33,286 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 6434 transitions. [2021-12-22 13:12:33,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:12:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 6434 transitions. [2021-12-22 13:12:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 13:12:33,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:33,289 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:33,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:33,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 13:12:33,512 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash -863953769, now seen corresponding path program 2 times [2021-12-22 13:12:33,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716039128] [2021-12-22 13:12:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:33,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:33,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716039128] [2021-12-22 13:12:33,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716039128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:33,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:33,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:33,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028742641] [2021-12-22 13:12:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:33,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:33,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:33,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:33,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:33,579 INFO L87 Difference]: Start difference. First operand 5128 states and 6434 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:34,052 INFO L93 Difference]: Finished difference Result 7810 states and 9807 transitions. [2021-12-22 13:12:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:12:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-22 13:12:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:34,069 INFO L225 Difference]: With dead ends: 7810 [2021-12-22 13:12:34,070 INFO L226 Difference]: Without dead ends: 3735 [2021-12-22 13:12:34,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:34,079 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 741 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:34,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 865 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-12-22 13:12:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 3500. [2021-12-22 13:12:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 2739 states have (on average 1.2515516611902153) internal successors, (3428), 2781 states have internal predecessors, (3428), 380 states have call successors, (380), 308 states have call predecessors, (380), 379 states have return successors, (524), 417 states have call predecessors, (524), 377 states have call successors, (524) [2021-12-22 13:12:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 4332 transitions. [2021-12-22 13:12:34,320 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 4332 transitions. Word has length 77 [2021-12-22 13:12:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:34,320 INFO L470 AbstractCegarLoop]: Abstraction has 3500 states and 4332 transitions. [2021-12-22 13:12:34,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 4332 transitions. [2021-12-22 13:12:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:34,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:34,324 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] [2021-12-22 13:12:34,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:12:34,325 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:34,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1029310995, now seen corresponding path program 1 times [2021-12-22 13:12:34,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:34,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856340607] [2021-12-22 13:12:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:34,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:34,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856340607] [2021-12-22 13:12:34,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856340607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:34,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:34,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:34,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152906610] [2021-12-22 13:12:34,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:34,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:34,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:34,398 INFO L87 Difference]: Start difference. First operand 3500 states and 4332 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:35,463 INFO L93 Difference]: Finished difference Result 3882 states and 4923 transitions. [2021-12-22 13:12:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:35,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:35,479 INFO L225 Difference]: With dead ends: 3882 [2021-12-22 13:12:35,480 INFO L226 Difference]: Without dead ends: 3734 [2021-12-22 13:12:35,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:35,482 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 752 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:35,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 1003 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:12:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2021-12-22 13:12:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3647. [2021-12-22 13:12:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 2867 states have (on average 1.264387861876526) internal successors, (3625), 2910 states have internal predecessors, (3625), 392 states have call successors, (392), 314 states have call predecessors, (392), 386 states have return successors, (539), 429 states have call predecessors, (539), 389 states have call successors, (539) [2021-12-22 13:12:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 4556 transitions. [2021-12-22 13:12:35,694 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 4556 transitions. Word has length 80 [2021-12-22 13:12:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:35,695 INFO L470 AbstractCegarLoop]: Abstraction has 3647 states and 4556 transitions. [2021-12-22 13:12:35,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 4556 transitions. [2021-12-22 13:12:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:35,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:35,699 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] [2021-12-22 13:12:35,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:12:35,700 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash -212129521, now seen corresponding path program 1 times [2021-12-22 13:12:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838805970] [2021-12-22 13:12:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:35,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:35,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:35,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:35,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:35,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:35,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:35,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838805970] [2021-12-22 13:12:35,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838805970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:35,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:35,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:35,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179328141] [2021-12-22 13:12:35,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:35,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:35,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:35,816 INFO L87 Difference]: Start difference. First operand 3647 states and 4556 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:37,075 INFO L93 Difference]: Finished difference Result 4220 states and 5436 transitions. [2021-12-22 13:12:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:37,088 INFO L225 Difference]: With dead ends: 4220 [2021-12-22 13:12:37,088 INFO L226 Difference]: Without dead ends: 3925 [2021-12-22 13:12:37,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:37,091 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 743 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:37,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 1566 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:12:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-12-22 13:12:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3785. [2021-12-22 13:12:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 2986 states have (on average 1.2739450770261218) internal successors, (3804), 3030 states have internal predecessors, (3804), 404 states have call successors, (404), 320 states have call predecessors, (404), 393 states have return successors, (553), 442 states have call predecessors, (553), 401 states have call successors, (553) [2021-12-22 13:12:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 4761 transitions. [2021-12-22 13:12:37,314 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 4761 transitions. Word has length 80 [2021-12-22 13:12:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:37,315 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 4761 transitions. [2021-12-22 13:12:37,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 4761 transitions. [2021-12-22 13:12:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:37,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:37,318 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] [2021-12-22 13:12:37,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:12:37,319 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1898309359, now seen corresponding path program 1 times [2021-12-22 13:12:37,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:37,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139859633] [2021-12-22 13:12:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:37,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:37,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:37,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139859633] [2021-12-22 13:12:37,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139859633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:37,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:37,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:37,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879435470] [2021-12-22 13:12:37,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:37,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:37,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:37,401 INFO L87 Difference]: Start difference. First operand 3785 states and 4761 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:38,633 INFO L93 Difference]: Finished difference Result 4717 states and 6189 transitions. [2021-12-22 13:12:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:38,651 INFO L225 Difference]: With dead ends: 4717 [2021-12-22 13:12:38,652 INFO L226 Difference]: Without dead ends: 4284 [2021-12-22 13:12:38,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:38,657 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 740 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:38,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1554 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:12:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-12-22 13:12:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 4062. [2021-12-22 13:12:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 3225 states have (on average 1.2908527131782945) internal successors, (4163), 3271 states have internal predecessors, (4163), 428 states have call successors, (428), 332 states have call predecessors, (428), 407 states have return successors, (585), 468 states have call predecessors, (585), 425 states have call successors, (585) [2021-12-22 13:12:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 5176 transitions. [2021-12-22 13:12:38,928 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 5176 transitions. Word has length 80 [2021-12-22 13:12:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:38,928 INFO L470 AbstractCegarLoop]: Abstraction has 4062 states and 5176 transitions. [2021-12-22 13:12:38,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 5176 transitions. [2021-12-22 13:12:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:38,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:38,931 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] [2021-12-22 13:12:38,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:12:38,932 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1952702257, now seen corresponding path program 1 times [2021-12-22 13:12:38,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:38,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590138736] [2021-12-22 13:12:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:38,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:39,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590138736] [2021-12-22 13:12:39,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590138736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:39,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:39,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:39,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772040597] [2021-12-22 13:12:39,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:39,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:39,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:39,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:39,015 INFO L87 Difference]: Start difference. First operand 4062 states and 5176 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:39,708 INFO L93 Difference]: Finished difference Result 4982 states and 6595 transitions. [2021-12-22 13:12:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:39,725 INFO L225 Difference]: With dead ends: 4982 [2021-12-22 13:12:39,725 INFO L226 Difference]: Without dead ends: 4272 [2021-12-22 13:12:39,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:39,730 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 613 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:39,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 955 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2021-12-22 13:12:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 4062. [2021-12-22 13:12:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 3225 states have (on average 1.2893023255813953) internal successors, (4158), 3271 states have internal predecessors, (4158), 428 states have call successors, (428), 332 states have call predecessors, (428), 407 states have return successors, (585), 468 states have call predecessors, (585), 425 states have call successors, (585) [2021-12-22 13:12:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 5171 transitions. [2021-12-22 13:12:39,979 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 5171 transitions. Word has length 80 [2021-12-22 13:12:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:39,979 INFO L470 AbstractCegarLoop]: Abstraction has 4062 states and 5171 transitions. [2021-12-22 13:12:39,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 5171 transitions. [2021-12-22 13:12:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:39,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:39,983 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] [2021-12-22 13:12:39,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:12:39,983 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1924868433, now seen corresponding path program 1 times [2021-12-22 13:12:39,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920829980] [2021-12-22 13:12:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:39,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:40,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:40,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920829980] [2021-12-22 13:12:40,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920829980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:40,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:40,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:40,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613936259] [2021-12-22 13:12:40,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:40,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:40,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:40,055 INFO L87 Difference]: Start difference. First operand 4062 states and 5171 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:40,822 INFO L93 Difference]: Finished difference Result 4976 states and 6569 transitions. [2021-12-22 13:12:40,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:40,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:40,837 INFO L225 Difference]: With dead ends: 4976 [2021-12-22 13:12:40,837 INFO L226 Difference]: Without dead ends: 4266 [2021-12-22 13:12:40,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:40,841 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 609 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:40,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 949 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-12-22 13:12:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 4062. [2021-12-22 13:12:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 3225 states have (on average 1.2877519379844962) internal successors, (4153), 3271 states have internal predecessors, (4153), 428 states have call successors, (428), 332 states have call predecessors, (428), 407 states have return successors, (585), 468 states have call predecessors, (585), 425 states have call successors, (585) [2021-12-22 13:12:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 5166 transitions. [2021-12-22 13:12:41,092 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 5166 transitions. Word has length 80 [2021-12-22 13:12:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:41,092 INFO L470 AbstractCegarLoop]: Abstraction has 4062 states and 5166 transitions. [2021-12-22 13:12:41,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 5166 transitions. [2021-12-22 13:12:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:41,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:41,096 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] [2021-12-22 13:12:41,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:12:41,096 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1690826609, now seen corresponding path program 1 times [2021-12-22 13:12:41,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:41,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015899394] [2021-12-22 13:12:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:41,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:41,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:41,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015899394] [2021-12-22 13:12:41,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015899394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:41,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:41,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:41,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363956580] [2021-12-22 13:12:41,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:41,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:41,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:41,175 INFO L87 Difference]: Start difference. First operand 4062 states and 5166 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:42,321 INFO L93 Difference]: Finished difference Result 5819 states and 7800 transitions. [2021-12-22 13:12:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:12:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:42,344 INFO L225 Difference]: With dead ends: 5819 [2021-12-22 13:12:42,344 INFO L226 Difference]: Without dead ends: 5109 [2021-12-22 13:12:42,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:42,350 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 858 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:42,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1190 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:12:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5109 states. [2021-12-22 13:12:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5109 to 4573. [2021-12-22 13:12:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 3664 states have (on average 1.3081331877729259) internal successors, (4793), 3714 states have internal predecessors, (4793), 472 states have call successors, (472), 356 states have call predecessors, (472), 435 states have return successors, (651), 516 states have call predecessors, (651), 469 states have call successors, (651) [2021-12-22 13:12:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 5916 transitions. [2021-12-22 13:12:42,670 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 5916 transitions. Word has length 80 [2021-12-22 13:12:42,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:42,670 INFO L470 AbstractCegarLoop]: Abstraction has 4573 states and 5916 transitions. [2021-12-22 13:12:42,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 5916 transitions. [2021-12-22 13:12:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:42,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:42,675 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] [2021-12-22 13:12:42,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:12:42,675 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash 270748049, now seen corresponding path program 1 times [2021-12-22 13:12:42,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664644550] [2021-12-22 13:12:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:42,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:42,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:42,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664644550] [2021-12-22 13:12:42,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664644550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:42,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:42,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:42,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930653000] [2021-12-22 13:12:42,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:42,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:42,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:42,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:42,749 INFO L87 Difference]: Start difference. First operand 4573 states and 5916 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:43,941 INFO L93 Difference]: Finished difference Result 7514 states and 10302 transitions. [2021-12-22 13:12:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:12:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:43,956 INFO L225 Difference]: With dead ends: 7514 [2021-12-22 13:12:43,956 INFO L226 Difference]: Without dead ends: 6293 [2021-12-22 13:12:43,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:43,960 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 736 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:43,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1519 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:12:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2021-12-22 13:12:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 5634. [2021-12-22 13:12:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 4585 states have (on average 1.3424209378407852) internal successors, (6155), 4643 states have internal predecessors, (6155), 556 states have call successors, (556), 404 states have call predecessors, (556), 491 states have return successors, (797), 608 states have call predecessors, (797), 553 states have call successors, (797) [2021-12-22 13:12:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 7508 transitions. [2021-12-22 13:12:44,312 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 7508 transitions. Word has length 80 [2021-12-22 13:12:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:44,313 INFO L470 AbstractCegarLoop]: Abstraction has 5634 states and 7508 transitions. [2021-12-22 13:12:44,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 7508 transitions. [2021-12-22 13:12:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:44,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:44,319 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] [2021-12-22 13:12:44,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:12:44,319 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:44,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash 831447827, now seen corresponding path program 1 times [2021-12-22 13:12:44,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:44,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997169401] [2021-12-22 13:12:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:44,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:44,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997169401] [2021-12-22 13:12:44,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997169401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:44,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:44,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:44,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991199793] [2021-12-22 13:12:44,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:44,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:44,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:44,395 INFO L87 Difference]: Start difference. First operand 5634 states and 7508 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:45,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:45,414 INFO L93 Difference]: Finished difference Result 9406 states and 13156 transitions. [2021-12-22 13:12:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:45,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:45,435 INFO L225 Difference]: With dead ends: 9406 [2021-12-22 13:12:45,435 INFO L226 Difference]: Without dead ends: 7125 [2021-12-22 13:12:45,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:12:45,445 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 460 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:45,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 1351 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7125 states. [2021-12-22 13:12:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7125 to 5685. [2021-12-22 13:12:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5685 states, 4636 states have (on average 1.3386540120793788) internal successors, (6206), 4694 states have internal predecessors, (6206), 556 states have call successors, (556), 404 states have call predecessors, (556), 491 states have return successors, (797), 608 states have call predecessors, (797), 553 states have call successors, (797) [2021-12-22 13:12:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5685 states to 5685 states and 7559 transitions. [2021-12-22 13:12:45,913 INFO L78 Accepts]: Start accepts. Automaton has 5685 states and 7559 transitions. Word has length 80 [2021-12-22 13:12:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:45,913 INFO L470 AbstractCegarLoop]: Abstraction has 5685 states and 7559 transitions. [2021-12-22 13:12:45,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5685 states and 7559 transitions. [2021-12-22 13:12:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 13:12:45,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:45,918 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] [2021-12-22 13:12:45,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:12:45,918 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash 350367569, now seen corresponding path program 1 times [2021-12-22 13:12:45,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:45,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464233813] [2021-12-22 13:12:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:45,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:46,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464233813] [2021-12-22 13:12:46,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464233813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:46,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:46,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:46,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341146518] [2021-12-22 13:12:46,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:46,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:46,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:46,019 INFO L87 Difference]: Start difference. First operand 5685 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:48,002 INFO L93 Difference]: Finished difference Result 13719 states and 19840 transitions. [2021-12-22 13:12:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:12:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 13:12:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:48,041 INFO L225 Difference]: With dead ends: 13719 [2021-12-22 13:12:48,042 INFO L226 Difference]: Without dead ends: 11387 [2021-12-22 13:12:48,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:12:48,056 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 1539 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:48,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 1403 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2021-12-22 13:12:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 10008. [2021-12-22 13:12:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 8344 states have (on average 1.3851869606903164) internal successors, (11558), 8461 states have internal predecessors, (11558), 929 states have call successors, (929), 614 states have call predecessors, (929), 733 states have return successors, (1452), 954 states have call predecessors, (1452), 926 states have call successors, (1452) [2021-12-22 13:12:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 13939 transitions. [2021-12-22 13:12:48,859 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 13939 transitions. Word has length 80 [2021-12-22 13:12:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:48,860 INFO L470 AbstractCegarLoop]: Abstraction has 10008 states and 13939 transitions. [2021-12-22 13:12:48,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 13939 transitions. [2021-12-22 13:12:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 13:12:48,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:48,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:48,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:12:48,883 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1956288145, now seen corresponding path program 1 times [2021-12-22 13:12:48,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:48,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936132731] [2021-12-22 13:12:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:48,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:12:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:12:48,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936132731] [2021-12-22 13:12:48,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936132731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:48,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:48,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:48,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128137736] [2021-12-22 13:12:48,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:48,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:48,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:48,980 INFO L87 Difference]: Start difference. First operand 10008 states and 13939 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:50,585 INFO L93 Difference]: Finished difference Result 16880 states and 22356 transitions. [2021-12-22 13:12:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:12:50,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-22 13:12:50,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:50,628 INFO L225 Difference]: With dead ends: 16880 [2021-12-22 13:12:50,628 INFO L226 Difference]: Without dead ends: 12243 [2021-12-22 13:12:50,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:12:50,644 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 887 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:50,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 1387 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2021-12-22 13:12:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 11923. [2021-12-22 13:12:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11923 states, 9802 states have (on average 1.3549275658028974) internal successors, (13281), 9962 states have internal predecessors, (13281), 1133 states have call successors, (1133), 788 states have call predecessors, (1133), 986 states have return successors, (1834), 1194 states have call predecessors, (1834), 1130 states have call successors, (1834) [2021-12-22 13:12:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11923 states to 11923 states and 16248 transitions. [2021-12-22 13:12:51,606 INFO L78 Accepts]: Start accepts. Automaton has 11923 states and 16248 transitions. Word has length 84 [2021-12-22 13:12:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:51,608 INFO L470 AbstractCegarLoop]: Abstraction has 11923 states and 16248 transitions. [2021-12-22 13:12:51,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11923 states and 16248 transitions. [2021-12-22 13:12:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:12:51,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:51,623 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:51,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:12:51,624 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash -197625515, now seen corresponding path program 1 times [2021-12-22 13:12:51,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:51,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091808920] [2021-12-22 13:12:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:51,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:12:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 13:12:51,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:51,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091808920] [2021-12-22 13:12:51,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091808920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:51,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:51,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:51,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157203573] [2021-12-22 13:12:51,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:51,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:51,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:51,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:51,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:51,740 INFO L87 Difference]: Start difference. First operand 11923 states and 16248 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:53,480 INFO L93 Difference]: Finished difference Result 15926 states and 21088 transitions. [2021-12-22 13:12:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:12:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-22 13:12:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:53,514 INFO L225 Difference]: With dead ends: 15926 [2021-12-22 13:12:53,515 INFO L226 Difference]: Without dead ends: 11333 [2021-12-22 13:12:53,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:12:53,528 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 1528 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:53,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1565 Valid, 1405 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:12:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2021-12-22 13:12:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 10999. [2021-12-22 13:12:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10999 states, 9091 states have (on average 1.3617863821361786) internal successors, (12380), 9233 states have internal predecessors, (12380), 1034 states have call successors, (1034), 703 states have call predecessors, (1034), 872 states have return successors, (1612), 1084 states have call predecessors, (1612), 1031 states have call successors, (1612) [2021-12-22 13:12:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10999 states to 10999 states and 15026 transitions. [2021-12-22 13:12:54,335 INFO L78 Accepts]: Start accepts. Automaton has 10999 states and 15026 transitions. Word has length 93 [2021-12-22 13:12:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:54,335 INFO L470 AbstractCegarLoop]: Abstraction has 10999 states and 15026 transitions. [2021-12-22 13:12:54,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 10999 states and 15026 transitions. [2021-12-22 13:12:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 13:12:54,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:54,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:54,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:12:54,357 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1663679213, now seen corresponding path program 1 times [2021-12-22 13:12:54,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82379622] [2021-12-22 13:12:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:54,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:12:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:12:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 13:12:54,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:54,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82379622] [2021-12-22 13:12:54,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82379622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:54,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661091404] [2021-12-22 13:12:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:54,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:54,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:12:54,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:12:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:12:54,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 13:12:54,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:54,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661091404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:54,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:54,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 13:12:54,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675118335] [2021-12-22 13:12:54,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:54,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:54,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:54,778 INFO L87 Difference]: Start difference. First operand 10999 states and 15026 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:55,720 INFO L93 Difference]: Finished difference Result 24036 states and 34570 transitions. [2021-12-22 13:12:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:55,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-12-22 13:12:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:55,770 INFO L225 Difference]: With dead ends: 24036 [2021-12-22 13:12:55,770 INFO L226 Difference]: Without dead ends: 17381 [2021-12-22 13:12:55,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:55,794 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 311 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:55,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 581 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17381 states. [2021-12-22 13:12:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17381 to 17273. [2021-12-22 13:12:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17273 states, 14503 states have (on average 1.3946080121354203) internal successors, (20226), 14720 states have internal predecessors, (20226), 1540 states have call successors, (1540), 1011 states have call predecessors, (1540), 1228 states have return successors, (2455), 1563 states have call predecessors, (2455), 1537 states have call successors, (2455) [2021-12-22 13:12:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17273 states to 17273 states and 24221 transitions. [2021-12-22 13:12:57,060 INFO L78 Accepts]: Start accepts. Automaton has 17273 states and 24221 transitions. Word has length 129 [2021-12-22 13:12:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:57,060 INFO L470 AbstractCegarLoop]: Abstraction has 17273 states and 24221 transitions. [2021-12-22 13:12:57,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17273 states and 24221 transitions. [2021-12-22 13:12:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 13:12:57,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:57,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:57,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:57,300 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,SelfDestructingSolverStorable23 [2021-12-22 13:12:57,300 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 389348365, now seen corresponding path program 1 times [2021-12-22 13:12:57,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:57,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009903395] [2021-12-22 13:12:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:57,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:12:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:12:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:12:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:12:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 13:12:57,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009903395] [2021-12-22 13:12:57,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009903395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729935450] [2021-12-22 13:12:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:57,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:57,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:12:57,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:12:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:12:57,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 13:12:57,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:57,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729935450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:57,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:57,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:12:57,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665951849] [2021-12-22 13:12:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:57,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:57,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:57,694 INFO L87 Difference]: Start difference. First operand 17273 states and 24221 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:12:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:59,317 INFO L93 Difference]: Finished difference Result 42508 states and 61581 transitions. [2021-12-22 13:12:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 129 [2021-12-22 13:12:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:59,357 INFO L225 Difference]: With dead ends: 42508 [2021-12-22 13:12:59,358 INFO L226 Difference]: Without dead ends: 19542 [2021-12-22 13:12:59,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:59,395 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 192 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:59,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 918 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19542 states. [2021-12-22 13:13:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19542 to 19542. [2021-12-22 13:13:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19542 states, 16465 states have (on average 1.3992104464014576) internal successors, (23038), 16698 states have internal predecessors, (23038), 1723 states have call successors, (1723), 1119 states have call predecessors, (1723), 1352 states have return successors, (2769), 1746 states have call predecessors, (2769), 1720 states have call successors, (2769) [2021-12-22 13:13:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19542 states to 19542 states and 27530 transitions. [2021-12-22 13:13:00,420 INFO L78 Accepts]: Start accepts. Automaton has 19542 states and 27530 transitions. Word has length 129 [2021-12-22 13:13:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:00,421 INFO L470 AbstractCegarLoop]: Abstraction has 19542 states and 27530 transitions. [2021-12-22 13:13:00,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:13:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 19542 states and 27530 transitions. [2021-12-22 13:13:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 13:13:00,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:00,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:00,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:13:00,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:13:00,669 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1234059877, now seen corresponding path program 1 times [2021-12-22 13:13:00,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:00,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41803124] [2021-12-22 13:13:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:00,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:13:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:13:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:13:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:13:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:13:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:13:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:13:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 13:13:00,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41803124] [2021-12-22 13:13:00,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41803124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:13:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210913925] [2021-12-22 13:13:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:00,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:13:00,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:13:00,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:13:00,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:13:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 13:13:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:13:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:13:01,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:13:01,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210913925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:01,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:13:01,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-22 13:13:01,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659364515] [2021-12-22 13:13:01,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:01,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:01,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:01,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:13:01,105 INFO L87 Difference]: Start difference. First operand 19542 states and 27530 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:13:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:01,907 INFO L93 Difference]: Finished difference Result 21708 states and 30153 transitions. [2021-12-22 13:13:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:13:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-22 13:13:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:01,962 INFO L225 Difference]: With dead ends: 21708 [2021-12-22 13:13:01,962 INFO L226 Difference]: Without dead ends: 17403 [2021-12-22 13:13:01,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:13:01,982 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 34 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:01,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1783 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:13:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17403 states. [2021-12-22 13:13:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17403 to 17278. [2021-12-22 13:13:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17278 states, 14778 states have (on average 1.4199485722019218) internal successors, (20984), 14960 states have internal predecessors, (20984), 1447 states have call successors, (1447), 885 states have call predecessors, (1447), 1051 states have return successors, (2376), 1448 states have call predecessors, (2376), 1444 states have call successors, (2376) [2021-12-22 13:13:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17278 states to 17278 states and 24807 transitions. [2021-12-22 13:13:03,109 INFO L78 Accepts]: Start accepts. Automaton has 17278 states and 24807 transitions. Word has length 145 [2021-12-22 13:13:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:03,109 INFO L470 AbstractCegarLoop]: Abstraction has 17278 states and 24807 transitions. [2021-12-22 13:13:03,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:13:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 17278 states and 24807 transitions. [2021-12-22 13:13:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 13:13:03,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:03,128 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:03,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:13:03,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-22 13:13:03,351 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1525119333, now seen corresponding path program 1 times [2021-12-22 13:13:03,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750020442] [2021-12-22 13:13:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:03,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:13:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:13:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:13:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:13:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:13:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:13:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:13:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 13:13:03,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:03,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750020442] [2021-12-22 13:13:03,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750020442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:03,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:03,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:13:03,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020686962] [2021-12-22 13:13:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:03,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:03,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:13:03,435 INFO L87 Difference]: Start difference. First operand 17278 states and 24807 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:13:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:04,497 INFO L93 Difference]: Finished difference Result 17343 states and 24875 transitions. [2021-12-22 13:13:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:13:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-22 13:13:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:04,533 INFO L225 Difference]: With dead ends: 17343 [2021-12-22 13:13:04,534 INFO L226 Difference]: Without dead ends: 16900 [2021-12-22 13:13:04,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:13:04,541 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 522 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:04,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 804 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:13:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16900 states. [2021-12-22 13:13:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16900 to 16838. [2021-12-22 13:13:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16838 states, 14434 states have (on average 1.4258001939864209) internal successors, (20580), 14613 states have internal predecessors, (20580), 1401 states have call successors, (1401), 845 states have call predecessors, (1401), 1001 states have return successors, (2312), 1395 states have call predecessors, (2312), 1398 states have call successors, (2312) [2021-12-22 13:13:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16838 states to 16838 states and 24293 transitions. [2021-12-22 13:13:05,650 INFO L78 Accepts]: Start accepts. Automaton has 16838 states and 24293 transitions. Word has length 147 [2021-12-22 13:13:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:05,650 INFO L470 AbstractCegarLoop]: Abstraction has 16838 states and 24293 transitions. [2021-12-22 13:13:05,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:13:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 16838 states and 24293 transitions. [2021-12-22 13:13:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 13:13:05,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:05,667 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:05,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:13:05,667 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1268854173, now seen corresponding path program 1 times [2021-12-22 13:13:05,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305351213] [2021-12-22 13:13:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:05,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:13:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:13:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:13:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:13:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-22 13:13:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 13:13:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 13:13:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 13:13:05,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305351213] [2021-12-22 13:13:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305351213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:05,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:05,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:05,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005681108] [2021-12-22 13:13:05,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:05,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:05,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:05,752 INFO L87 Difference]: Start difference. First operand 16838 states and 24293 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:13:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:06,865 INFO L93 Difference]: Finished difference Result 18315 states and 26092 transitions. [2021-12-22 13:13:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:13:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-22 13:13:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:06,907 INFO L225 Difference]: With dead ends: 18315 [2021-12-22 13:13:06,907 INFO L226 Difference]: Without dead ends: 16939 [2021-12-22 13:13:06,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:13:06,917 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 453 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:06,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 1145 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:13:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16939 states. [2021-12-22 13:13:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16939 to 16747. [2021-12-22 13:13:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16747 states, 14365 states have (on average 1.4267316394013227) internal successors, (20495), 14545 states have internal predecessors, (20495), 1392 states have call successors, (1392), 840 states have call predecessors, (1392), 988 states have return successors, (2296), 1377 states have call predecessors, (2296), 1389 states have call successors, (2296) [2021-12-22 13:13:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16747 states to 16747 states and 24183 transitions. [2021-12-22 13:13:07,933 INFO L78 Accepts]: Start accepts. Automaton has 16747 states and 24183 transitions. Word has length 159 [2021-12-22 13:13:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:07,934 INFO L470 AbstractCegarLoop]: Abstraction has 16747 states and 24183 transitions. [2021-12-22 13:13:07,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:13:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 16747 states and 24183 transitions. [2021-12-22 13:13:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 13:13:07,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:07,954 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:07,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:13:07,954 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:07,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash 35384604, now seen corresponding path program 1 times [2021-12-22 13:13:07,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:07,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72883832] [2021-12-22 13:13:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:07,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:13:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:13:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:13:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:13:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:13:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 13:13:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 13:13:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 13:13:08,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:08,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72883832] [2021-12-22 13:13:08,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72883832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:13:08,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997907401] [2021-12-22 13:13:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:08,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:13:08,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:13:08,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:13:08,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:13:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:08,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:13:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:13:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:13:08,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:13:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 13:13:08,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997907401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:13:08,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:13:08,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-22 13:13:08,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081851356] [2021-12-22 13:13:08,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:13:08,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:13:08,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:13:08,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:13:08,840 INFO L87 Difference]: Start difference. First operand 16747 states and 24183 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-22 13:13:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:10,564 INFO L93 Difference]: Finished difference Result 18719 states and 26636 transitions. [2021-12-22 13:13:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 13:13:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-22 13:13:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:10,610 INFO L225 Difference]: With dead ends: 18719 [2021-12-22 13:13:10,610 INFO L226 Difference]: Without dead ends: 17287 [2021-12-22 13:13:10,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 354 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-22 13:13:10,622 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 1253 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:10,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 1336 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:13:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17287 states.