./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_3.cil+token_ring.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8067f6f3f9b2e7af84aa5945c9ed2ea4ff7d9ddfc1aa86a10fb4bb83ea8bdef8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:34:07,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:34:07,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:34:07,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:34:07,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:34:07,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:34:07,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:34:07,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:34:07,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:34:07,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:34:07,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:34:07,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:34:07,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:34:07,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:34:07,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:34:07,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:34:07,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:34:07,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:34:07,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:34:07,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:34:07,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:34:07,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:34:07,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:34:07,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:34:07,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:34:07,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:34:07,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:34:07,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:34:07,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:34:07,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:34:07,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:34:07,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:34:07,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:34:07,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:34:07,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:34:07,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:34:07,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:34:07,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:34:07,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:34:07,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:34:07,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:34:07,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:34:07,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:34:07,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:34:07,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:34:07,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:34:07,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:34:07,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:34:07,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:34:07,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:34:07,986 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:34:07,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:34:07,987 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:34:07,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:34:07,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:34:07,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:34:07,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:34:07,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:34:07,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:34:07,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:34:07,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:34:07,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:34:07,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:34:07,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:34:07,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:34:07,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:34:07,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:34:07,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:34:07,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8067f6f3f9b2e7af84aa5945c9ed2ea4ff7d9ddfc1aa86a10fb4bb83ea8bdef8 [2021-12-28 02:34:08,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:34:08,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:34:08,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:34:08,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:34:08,288 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:34:08,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-28 02:34:08,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34859d20d/997cbeedfbb94be58d92972930d60b76/FLAG6907ff8bf [2021-12-28 02:34:08,700 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:34:08,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-28 02:34:08,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34859d20d/997cbeedfbb94be58d92972930d60b76/FLAG6907ff8bf [2021-12-28 02:34:09,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34859d20d/997cbeedfbb94be58d92972930d60b76 [2021-12-28 02:34:09,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:34:09,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:34:09,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:34:09,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:34:09,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:34:09,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aac53e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09, skipping insertion in model container [2021-12-28 02:34:09,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:34:09,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:34:09,241 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_3.cil+token_ring.05.cil-2.c[911,924] [2021-12-28 02:34:09,275 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_3.cil+token_ring.05.cil-2.c[8416,8429] [2021-12-28 02:34:09,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:34:09,313 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:34:09,352 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_3.cil+token_ring.05.cil-2.c[911,924] [2021-12-28 02:34:09,364 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_3.cil+token_ring.05.cil-2.c[8416,8429] [2021-12-28 02:34:09,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:34:09,425 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:34:09,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09 WrapperNode [2021-12-28 02:34:09,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:34:09,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:34:09,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:34:09,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:34:09,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,491 INFO L137 Inliner]: procedures = 65, calls = 77, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 677 [2021-12-28 02:34:09,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:34:09,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:34:09,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:34:09,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:34:09,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:34:09,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:34:09,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:34:09,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:34:09,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (1/1) ... [2021-12-28 02:34:09,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:34:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:34:09,586 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) [2021-12-28 02:34:09,605 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 [2021-12-28 02:34:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:34:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:34:09,611 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:34:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:34:09,611 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:34:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:34:09,611 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:34:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:34:09,612 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:34:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:34:09,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:34:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:34:09,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:34:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:34:09,612 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:34:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:34:09,613 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:34:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:34:09,613 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:34:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:34:09,613 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:34:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:34:09,613 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:34:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:34:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:34:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:34:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:34:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:34:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:34:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:34:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:34:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:34:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:34:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:34:09,696 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:34:09,697 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:34:10,063 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-28 02:34:10,064 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-28 02:34:10,106 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:34:10,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:34:10,114 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-28 02:34:10,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:34:10 BoogieIcfgContainer [2021-12-28 02:34:10,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:34:10,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:34:10,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:34:10,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:34:10,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:34:09" (1/3) ... [2021-12-28 02:34:10,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aab27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:34:10, skipping insertion in model container [2021-12-28 02:34:10,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:34:09" (2/3) ... [2021-12-28 02:34:10,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aab27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:34:10, skipping insertion in model container [2021-12-28 02:34:10,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:34:10" (3/3) ... [2021-12-28 02:34:10,121 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-28 02:34:10,124 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:34:10,124 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:34:10,155 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:34:10,159 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 [2021-12-28 02:34:10,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:34:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 332 states, 277 states have (on average 1.6028880866425992) internal successors, (444), 285 states have internal predecessors, (444), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-28 02:34:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:34:10,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:10,186 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] [2021-12-28 02:34:10,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash 481480506, now seen corresponding path program 1 times [2021-12-28 02:34:10,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:10,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053745545] [2021-12-28 02:34:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:10,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:34:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:34:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:34:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:10,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053745545] [2021-12-28 02:34:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053745545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:10,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:10,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:34:10,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960514866] [2021-12-28 02:34:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:10,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:34:10,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:10,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:34:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:34:10,593 INFO L87 Difference]: Start difference. First operand has 332 states, 277 states have (on average 1.6028880866425992) internal successors, (444), 285 states have internal predecessors, (444), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) 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) [2021-12-28 02:34:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:11,445 INFO L93 Difference]: Finished difference Result 793 states and 1237 transitions. [2021-12-28 02:34:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:34:11,447 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 [2021-12-28 02:34:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:11,458 INFO L225 Difference]: With dead ends: 793 [2021-12-28 02:34:11,458 INFO L226 Difference]: Without dead ends: 472 [2021-12-28 02:34:11,463 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 [2021-12-28 02:34:11,465 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 1089 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:11,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 1421 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:34:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-28 02:34:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 433. [2021-12-28 02:34:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 359 states have (on average 1.49025069637883) internal successors, (535), 366 states have internal predecessors, (535), 50 states have call successors, (50), 22 states have call predecessors, (50), 22 states have return successors, (51), 47 states have call predecessors, (51), 46 states have call successors, (51) [2021-12-28 02:34:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 636 transitions. [2021-12-28 02:34:11,540 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 636 transitions. Word has length 65 [2021-12-28 02:34:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:11,540 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 636 transitions. [2021-12-28 02:34:11,541 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) [2021-12-28 02:34:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 636 transitions. [2021-12-28 02:34:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:34:11,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:11,544 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] [2021-12-28 02:34:11,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:34:11,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:11,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2134598150, now seen corresponding path program 1 times [2021-12-28 02:34:11,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:11,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926878757] [2021-12-28 02:34:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:11,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:34:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:34:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:34:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:11,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:11,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926878757] [2021-12-28 02:34:11,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926878757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:11,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:11,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:34:11,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979208535] [2021-12-28 02:34:11,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:11,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:34:11,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:11,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:34:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:34:11,634 INFO L87 Difference]: Start difference. First operand 433 states and 636 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) [2021-12-28 02:34:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:12,411 INFO L93 Difference]: Finished difference Result 830 states and 1202 transitions. [2021-12-28 02:34:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:34:12,413 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 [2021-12-28 02:34:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:12,417 INFO L225 Difference]: With dead ends: 830 [2021-12-28 02:34:12,417 INFO L226 Difference]: Without dead ends: 621 [2021-12-28 02:34:12,418 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 [2021-12-28 02:34:12,419 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 1160 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:12,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 1536 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:34:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-12-28 02:34:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 545. [2021-12-28 02:34:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 449 states have (on average 1.4721603563474388) internal successors, (661), 458 states have internal predecessors, (661), 63 states have call successors, (63), 29 states have call predecessors, (63), 31 states have return successors, (72), 61 states have call predecessors, (72), 59 states have call successors, (72) [2021-12-28 02:34:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 796 transitions. [2021-12-28 02:34:12,453 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 796 transitions. Word has length 65 [2021-12-28 02:34:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:12,453 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 796 transitions. [2021-12-28 02:34:12,453 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) [2021-12-28 02:34:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 796 transitions. [2021-12-28 02:34:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:34:12,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:12,456 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] [2021-12-28 02:34:12,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:34:12,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash 131783036, now seen corresponding path program 1 times [2021-12-28 02:34:12,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:12,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102691598] [2021-12-28 02:34:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:12,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:34:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:34:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:34:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:12,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:12,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102691598] [2021-12-28 02:34:12,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102691598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:12,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:12,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:34:12,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937752249] [2021-12-28 02:34:12,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:12,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:34:12,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:34:12,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:34:12,545 INFO L87 Difference]: Start difference. First operand 545 states and 796 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-28 02:34:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:14,069 INFO L93 Difference]: Finished difference Result 2091 states and 2994 transitions. [2021-12-28 02:34:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:34:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-28 02:34:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:14,077 INFO L225 Difference]: With dead ends: 2091 [2021-12-28 02:34:14,078 INFO L226 Difference]: Without dead ends: 1758 [2021-12-28 02:34:14,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:34:14,081 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 2668 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:14,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 2347 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:34:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-12-28 02:34:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1598. [2021-12-28 02:34:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1297 states have (on average 1.3916730917501927) internal successors, (1805), 1321 states have internal predecessors, (1805), 173 states have call successors, (173), 112 states have call predecessors, (173), 126 states have return successors, (205), 167 states have call predecessors, (205), 169 states have call successors, (205) [2021-12-28 02:34:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2183 transitions. [2021-12-28 02:34:14,153 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2183 transitions. Word has length 65 [2021-12-28 02:34:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:14,154 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2183 transitions. [2021-12-28 02:34:14,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-28 02:34:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2183 transitions. [2021-12-28 02:34:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:34:14,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:14,156 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] [2021-12-28 02:34:14,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:34:14,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash 754147135, now seen corresponding path program 1 times [2021-12-28 02:34:14,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:14,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629779766] [2021-12-28 02:34:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:14,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:34:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 02:34:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:34:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:14,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:14,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629779766] [2021-12-28 02:34:14,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629779766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:14,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:14,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:34:14,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64390264] [2021-12-28 02:34:14,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:14,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:34:14,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:34:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:34:14,251 INFO L87 Difference]: Start difference. First operand 1598 states and 2183 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-12-28 02:34:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:14,894 INFO L93 Difference]: Finished difference Result 3126 states and 4262 transitions. [2021-12-28 02:34:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:34:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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 66 [2021-12-28 02:34:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:14,901 INFO L225 Difference]: With dead ends: 3126 [2021-12-28 02:34:14,901 INFO L226 Difference]: Without dead ends: 1746 [2021-12-28 02:34:14,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:34:14,904 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 576 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:14,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 1904 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:34:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-12-28 02:34:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1638. [2021-12-28 02:34:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1329 states have (on average 1.3777276147479307) internal successors, (1831), 1353 states have internal predecessors, (1831), 173 states have call successors, (173), 112 states have call predecessors, (173), 134 states have return successors, (213), 175 states have call predecessors, (213), 169 states have call successors, (213) [2021-12-28 02:34:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2217 transitions. [2021-12-28 02:34:14,960 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2217 transitions. Word has length 66 [2021-12-28 02:34:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:14,960 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2217 transitions. [2021-12-28 02:34:14,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-12-28 02:34:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2217 transitions. [2021-12-28 02:34:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:34:14,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:14,961 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] [2021-12-28 02:34:14,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:34:14,961 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash -275212163, now seen corresponding path program 1 times [2021-12-28 02:34:14,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846993947] [2021-12-28 02:34:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:14,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:14,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:15,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:15,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:15,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:15,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:34:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:15,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 02:34:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:15,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:34:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:15,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846993947] [2021-12-28 02:34:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846993947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:15,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:34:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488345564] [2021-12-28 02:34:15,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:15,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:34:15,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:34:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:34:15,054 INFO L87 Difference]: Start difference. First operand 1638 states and 2217 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:34:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:16,425 INFO L93 Difference]: Finished difference Result 5210 states and 7091 transitions. [2021-12-28 02:34:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:34:16,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-28 02:34:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:16,434 INFO L225 Difference]: With dead ends: 5210 [2021-12-28 02:34:16,434 INFO L226 Difference]: Without dead ends: 2029 [2021-12-28 02:34:16,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:34:16,441 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 2774 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2796 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:16,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2796 Valid, 2371 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:34:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-12-28 02:34:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1849. [2021-12-28 02:34:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1468 states have (on average 1.3331062670299727) internal successors, (1957), 1494 states have internal predecessors, (1957), 213 states have call successors, (213), 140 states have call predecessors, (213), 166 states have return successors, (259), 217 states have call predecessors, (259), 209 states have call successors, (259) [2021-12-28 02:34:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2429 transitions. [2021-12-28 02:34:16,520 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2429 transitions. Word has length 66 [2021-12-28 02:34:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2429 transitions. [2021-12-28 02:34:16,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:34:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2429 transitions. [2021-12-28 02:34:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 02:34:16,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:16,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:16,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:34:16,523 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash 443189305, now seen corresponding path program 1 times [2021-12-28 02:34:16,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:16,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510191937] [2021-12-28 02:34:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:16,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:34:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:34:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:34:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 02:34:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:34:16,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:16,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510191937] [2021-12-28 02:34:16,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510191937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:16,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:16,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:34:16,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583487951] [2021-12-28 02:34:16,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:16,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:34:16,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:34:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:34:16,622 INFO L87 Difference]: Start difference. First operand 1849 states and 2429 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 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) [2021-12-28 02:34:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:17,234 INFO L93 Difference]: Finished difference Result 3674 states and 4831 transitions. [2021-12-28 02:34:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:34:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 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 91 [2021-12-28 02:34:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:17,243 INFO L225 Difference]: With dead ends: 3674 [2021-12-28 02:34:17,244 INFO L226 Difference]: Without dead ends: 2043 [2021-12-28 02:34:17,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:34:17,249 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 384 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:17,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2066 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:34:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-12-28 02:34:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1909. [2021-12-28 02:34:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1516 states have (on average 1.3186015831134565) internal successors, (1999), 1542 states have internal predecessors, (1999), 213 states have call successors, (213), 140 states have call predecessors, (213), 178 states have return successors, (271), 229 states have call predecessors, (271), 209 states have call successors, (271) [2021-12-28 02:34:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2483 transitions. [2021-12-28 02:34:17,344 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2483 transitions. Word has length 91 [2021-12-28 02:34:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:17,346 INFO L470 AbstractCegarLoop]: Abstraction has 1909 states and 2483 transitions. [2021-12-28 02:34:17,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 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) [2021-12-28 02:34:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2483 transitions. [2021-12-28 02:34:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 02:34:17,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:17,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:17,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:34:17,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash 887089979, now seen corresponding path program 1 times [2021-12-28 02:34:17,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108674902] [2021-12-28 02:34:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:17,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:34:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:34:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:34:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 02:34:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:34:17,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:17,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108674902] [2021-12-28 02:34:17,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108674902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:17,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:17,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:17,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286350764] [2021-12-28 02:34:17,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:17,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:17,424 INFO L87 Difference]: Start difference. First operand 1909 states and 2483 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-28 02:34:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:17,883 INFO L93 Difference]: Finished difference Result 5506 states and 7191 transitions. [2021-12-28 02:34:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:34:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-28 02:34:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:17,898 INFO L225 Difference]: With dead ends: 5506 [2021-12-28 02:34:17,898 INFO L226 Difference]: Without dead ends: 3816 [2021-12-28 02:34:17,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:34:17,905 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 848 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:17,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 1455 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:34:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-12-28 02:34:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3596. [2021-12-28 02:34:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 2830 states have (on average 1.2848056537102472) internal successors, (3636), 2890 states have internal predecessors, (3636), 402 states have call successors, (402), 272 states have call predecessors, (402), 362 states have return successors, (603), 438 states have call predecessors, (603), 398 states have call successors, (603) [2021-12-28 02:34:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 4641 transitions. [2021-12-28 02:34:18,041 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 4641 transitions. Word has length 91 [2021-12-28 02:34:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:18,042 INFO L470 AbstractCegarLoop]: Abstraction has 3596 states and 4641 transitions. [2021-12-28 02:34:18,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-28 02:34:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 4641 transitions. [2021-12-28 02:34:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 02:34:18,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:18,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:18,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:34:18,044 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:18,045 INFO L85 PathProgramCache]: Analyzing trace with hash -170748099, now seen corresponding path program 1 times [2021-12-28 02:34:18,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:18,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122789973] [2021-12-28 02:34:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:18,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:34:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:34:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:34:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 02:34:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:34:18,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122789973] [2021-12-28 02:34:18,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122789973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:18,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:18,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:34:18,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258811906] [2021-12-28 02:34:18,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:18,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:34:18,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:34:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:34:18,113 INFO L87 Difference]: Start difference. First operand 3596 states and 4641 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:34:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:18,516 INFO L93 Difference]: Finished difference Result 5404 states and 6909 transitions. [2021-12-28 02:34:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:34:18,517 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-28 02:34:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:18,525 INFO L225 Difference]: With dead ends: 5404 [2021-12-28 02:34:18,525 INFO L226 Difference]: Without dead ends: 2027 [2021-12-28 02:34:18,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:34:18,532 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 500 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:18,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1239 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:34:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-12-28 02:34:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1909. [2021-12-28 02:34:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1516 states have (on average 1.2902374670184698) internal successors, (1956), 1542 states have internal predecessors, (1956), 213 states have call successors, (213), 140 states have call predecessors, (213), 178 states have return successors, (271), 229 states have call predecessors, (271), 209 states have call successors, (271) [2021-12-28 02:34:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2440 transitions. [2021-12-28 02:34:18,597 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2440 transitions. Word has length 91 [2021-12-28 02:34:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:18,597 INFO L470 AbstractCegarLoop]: Abstraction has 1909 states and 2440 transitions. [2021-12-28 02:34:18,598 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:34:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2440 transitions. [2021-12-28 02:34:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 02:34:18,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:18,600 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:34:18,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:34:18,601 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -196498665, now seen corresponding path program 1 times [2021-12-28 02:34:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:18,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488458973] [2021-12-28 02:34:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:18,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:34:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:34:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:34:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:34:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:34:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:34:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 02:34:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:34:18,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:18,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488458973] [2021-12-28 02:34:18,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488458973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:18,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:18,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:34:18,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872754958] [2021-12-28 02:34:18,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:18,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:34:18,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:34:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:34:18,692 INFO L87 Difference]: Start difference. First operand 1909 states and 2440 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) [2021-12-28 02:34:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:19,648 INFO L93 Difference]: Finished difference Result 4718 states and 6019 transitions. [2021-12-28 02:34:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 02:34:19,649 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 92 [2021-12-28 02:34:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:19,659 INFO L225 Difference]: With dead ends: 4718 [2021-12-28 02:34:19,659 INFO L226 Difference]: Without dead ends: 2723 [2021-12-28 02:34:19,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-28 02:34:19,667 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 1551 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:19,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 1776 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:34:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-12-28 02:34:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2546. [2021-12-28 02:34:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1994 states have (on average 1.2537612838515546) internal successors, (2500), 2029 states have internal predecessors, (2500), 292 states have call successors, (292), 189 states have call predecessors, (292), 258 states have return successors, (407), 330 states have call predecessors, (407), 288 states have call successors, (407) [2021-12-28 02:34:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3199 transitions. [2021-12-28 02:34:19,768 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3199 transitions. Word has length 92 [2021-12-28 02:34:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:19,768 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3199 transitions. [2021-12-28 02:34:19,769 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) [2021-12-28 02:34:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3199 transitions. [2021-12-28 02:34:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:19,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:19,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:19,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:34:19,772 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash -140072605, now seen corresponding path program 1 times [2021-12-28 02:34:19,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:19,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843632993] [2021-12-28 02:34:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:19,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:19,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:19,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:19,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843632993] [2021-12-28 02:34:19,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843632993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:19,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:19,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:34:19,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779663062] [2021-12-28 02:34:19,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:19,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:34:19,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:34:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:34:19,837 INFO L87 Difference]: Start difference. First operand 2546 states and 3199 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:34:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:20,410 INFO L93 Difference]: Finished difference Result 2813 states and 3621 transitions. [2021-12-28 02:34:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:34:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-28 02:34:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:20,419 INFO L225 Difference]: With dead ends: 2813 [2021-12-28 02:34:20,419 INFO L226 Difference]: Without dead ends: 2611 [2021-12-28 02:34:20,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:34:20,421 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 628 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:20,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 908 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:34:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-12-28 02:34:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2546. [2021-12-28 02:34:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1994 states have (on average 1.253259779338014) internal successors, (2499), 2029 states have internal predecessors, (2499), 292 states have call successors, (292), 189 states have call predecessors, (292), 258 states have return successors, (407), 330 states have call predecessors, (407), 288 states have call successors, (407) [2021-12-28 02:34:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3198 transitions. [2021-12-28 02:34:20,533 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3198 transitions. Word has length 102 [2021-12-28 02:34:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3198 transitions. [2021-12-28 02:34:20,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:34:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3198 transitions. [2021-12-28 02:34:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:20,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:20,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:20,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:34:20,536 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash 743436385, now seen corresponding path program 1 times [2021-12-28 02:34:20,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:20,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681349890] [2021-12-28 02:34:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:20,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:20,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:20,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:20,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:20,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:20,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:20,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681349890] [2021-12-28 02:34:20,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681349890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:20,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:20,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:34:20,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390840429] [2021-12-28 02:34:20,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:20,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:34:20,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:34:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:34:20,603 INFO L87 Difference]: Start difference. First operand 2546 states and 3198 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-12-28 02:34:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:21,588 INFO L93 Difference]: Finished difference Result 3072 states and 4029 transitions. [2021-12-28 02:34:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:34:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:21,599 INFO L225 Difference]: With dead ends: 3072 [2021-12-28 02:34:21,599 INFO L226 Difference]: Without dead ends: 2876 [2021-12-28 02:34:21,602 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 [2021-12-28 02:34:21,603 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1005 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:21,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 1220 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:34:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-12-28 02:34:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2745. [2021-12-28 02:34:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2172 states have (on average 1.2790055248618784) internal successors, (2778), 2208 states have internal predecessors, (2778), 306 states have call successors, (306), 195 states have call predecessors, (306), 265 states have return successors, (424), 344 states have call predecessors, (424), 302 states have call successors, (424) [2021-12-28 02:34:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 3508 transitions. [2021-12-28 02:34:21,747 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 3508 transitions. Word has length 102 [2021-12-28 02:34:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:21,748 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 3508 transitions. [2021-12-28 02:34:21,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-12-28 02:34:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 3508 transitions. [2021-12-28 02:34:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:21,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:21,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:21,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:34:21,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -940378787, now seen corresponding path program 1 times [2021-12-28 02:34:21,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043759132] [2021-12-28 02:34:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:21,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:21,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:21,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:21,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:21,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043759132] [2021-12-28 02:34:21,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043759132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:21,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:21,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:21,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974657499] [2021-12-28 02:34:21,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:21,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:21,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:21,832 INFO L87 Difference]: Start difference. First operand 2745 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:23,165 INFO L93 Difference]: Finished difference Result 3542 states and 4766 transitions. [2021-12-28 02:34:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:34:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:23,177 INFO L225 Difference]: With dead ends: 3542 [2021-12-28 02:34:23,177 INFO L226 Difference]: Without dead ends: 3147 [2021-12-28 02:34:23,179 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 [2021-12-28 02:34:23,180 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1008 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:23,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 1953 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:34:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-12-28 02:34:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2932. [2021-12-28 02:34:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2338 states have (on average 1.297262617621899) internal successors, (3033), 2375 states have internal predecessors, (3033), 320 states have call successors, (320), 201 states have call predecessors, (320), 272 states have return successors, (440), 359 states have call predecessors, (440), 316 states have call successors, (440) [2021-12-28 02:34:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 3793 transitions. [2021-12-28 02:34:23,316 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 3793 transitions. Word has length 102 [2021-12-28 02:34:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:23,316 INFO L470 AbstractCegarLoop]: Abstraction has 2932 states and 3793 transitions. [2021-12-28 02:34:23,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 3793 transitions. [2021-12-28 02:34:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:23,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:23,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:23,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:34:23,318 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1475457563, now seen corresponding path program 1 times [2021-12-28 02:34:23,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616772026] [2021-12-28 02:34:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:23,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:23,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:23,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:23,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:23,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:23,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616772026] [2021-12-28 02:34:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616772026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:23,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:23,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:23,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99346644] [2021-12-28 02:34:23,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:23,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:23,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:23,385 INFO L87 Difference]: Start difference. First operand 2932 states and 3793 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:24,722 INFO L93 Difference]: Finished difference Result 4232 states and 5839 transitions. [2021-12-28 02:34:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:34:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:24,740 INFO L225 Difference]: With dead ends: 4232 [2021-12-28 02:34:24,740 INFO L226 Difference]: Without dead ends: 3650 [2021-12-28 02:34:24,743 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 [2021-12-28 02:34:24,744 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1004 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:24,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 1946 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:34:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2021-12-28 02:34:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 3309. [2021-12-28 02:34:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 2673 states have (on average 1.3273475495697717) internal successors, (3548), 2712 states have internal predecessors, (3548), 348 states have call successors, (348), 213 states have call predecessors, (348), 286 states have return successors, (476), 389 states have call predecessors, (476), 344 states have call successors, (476) [2021-12-28 02:34:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4372 transitions. [2021-12-28 02:34:24,876 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4372 transitions. Word has length 102 [2021-12-28 02:34:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:24,876 INFO L470 AbstractCegarLoop]: Abstraction has 3309 states and 4372 transitions. [2021-12-28 02:34:24,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4372 transitions. [2021-12-28 02:34:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:24,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:24,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:24,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:34:24,878 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:24,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1494653539, now seen corresponding path program 1 times [2021-12-28 02:34:24,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:24,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574209274] [2021-12-28 02:34:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:24,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:24,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:24,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:24,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:24,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:24,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:24,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574209274] [2021-12-28 02:34:24,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574209274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:24,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:24,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:24,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978655682] [2021-12-28 02:34:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:24,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:24,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:24,960 INFO L87 Difference]: Start difference. First operand 3309 states and 4372 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:26,442 INFO L93 Difference]: Finished difference Result 5571 states and 7918 transitions. [2021-12-28 02:34:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:34:26,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:26,472 INFO L225 Difference]: With dead ends: 5571 [2021-12-28 02:34:26,472 INFO L226 Difference]: Without dead ends: 4612 [2021-12-28 02:34:26,478 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 [2021-12-28 02:34:26,479 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 1003 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:26,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 1941 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:34:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-12-28 02:34:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4066. [2021-12-28 02:34:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 3346 states have (on average 1.3693962940824866) internal successors, (4582), 3389 states have internal predecessors, (4582), 404 states have call successors, (404), 237 states have call predecessors, (404), 314 states have return successors, (554), 449 states have call predecessors, (554), 400 states have call successors, (554) [2021-12-28 02:34:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 5540 transitions. [2021-12-28 02:34:26,658 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 5540 transitions. Word has length 102 [2021-12-28 02:34:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:26,658 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 5540 transitions. [2021-12-28 02:34:26,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 5540 transitions. [2021-12-28 02:34:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:26,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:26,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:26,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:34:26,660 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash 72104411, now seen corresponding path program 1 times [2021-12-28 02:34:26,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:26,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051533033] [2021-12-28 02:34:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:26,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:26,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:26,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:26,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:26,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:26,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051533033] [2021-12-28 02:34:26,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051533033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:26,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:26,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:26,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151986618] [2021-12-28 02:34:26,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:26,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:26,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:26,732 INFO L87 Difference]: Start difference. First operand 4066 states and 5540 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:28,070 INFO L93 Difference]: Finished difference Result 8250 states and 12096 transitions. [2021-12-28 02:34:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:34:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:28,088 INFO L225 Difference]: With dead ends: 8250 [2021-12-28 02:34:28,088 INFO L226 Difference]: Without dead ends: 6534 [2021-12-28 02:34:28,096 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 [2021-12-28 02:34:28,097 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 1002 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:28,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1936 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:34:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-12-28 02:34:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5587. [2021-12-28 02:34:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 4699 states have (on average 1.4173228346456692) internal successors, (6660), 4750 states have internal predecessors, (6660), 516 states have call successors, (516), 285 states have call predecessors, (516), 370 states have return successors, (728), 569 states have call predecessors, (728), 512 states have call successors, (728) [2021-12-28 02:34:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 7904 transitions. [2021-12-28 02:34:28,335 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 7904 transitions. Word has length 102 [2021-12-28 02:34:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:28,335 INFO L470 AbstractCegarLoop]: Abstraction has 5587 states and 7904 transitions. [2021-12-28 02:34:28,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 7904 transitions. [2021-12-28 02:34:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:28,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:28,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:28,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:34:28,338 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash -985733667, now seen corresponding path program 1 times [2021-12-28 02:34:28,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:28,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789270693] [2021-12-28 02:34:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:28,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:28,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:28,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:28,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:28,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789270693] [2021-12-28 02:34:28,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789270693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:28,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:28,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:28,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726061953] [2021-12-28 02:34:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:28,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:28,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:28,419 INFO L87 Difference]: Start difference. First operand 5587 states and 7904 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:30,272 INFO L93 Difference]: Finished difference Result 14873 states and 22404 transitions. [2021-12-28 02:34:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:34:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:30,301 INFO L225 Difference]: With dead ends: 14873 [2021-12-28 02:34:30,301 INFO L226 Difference]: Without dead ends: 11636 [2021-12-28 02:34:30,314 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 [2021-12-28 02:34:30,315 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 1054 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:30,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 2009 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:34:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11636 states. [2021-12-28 02:34:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11636 to 8596. [2021-12-28 02:34:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 7388 states have (on average 1.4626421223605848) internal successors, (10806), 7455 states have internal predecessors, (10806), 724 states have call successors, (724), 381 states have call predecessors, (724), 482 states have return successors, (1114), 793 states have call predecessors, (1114), 720 states have call successors, (1114) [2021-12-28 02:34:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 12644 transitions. [2021-12-28 02:34:30,735 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 12644 transitions. Word has length 102 [2021-12-28 02:34:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:30,736 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 12644 transitions. [2021-12-28 02:34:30,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 12644 transitions. [2021-12-28 02:34:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:30,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:30,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:30,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:34:30,741 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2128236133, now seen corresponding path program 1 times [2021-12-28 02:34:30,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:30,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524633898] [2021-12-28 02:34:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:30,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:30,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:30,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:30,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524633898] [2021-12-28 02:34:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524633898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:30,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:30,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:30,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793566275] [2021-12-28 02:34:30,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:30,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:30,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:30,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:30,814 INFO L87 Difference]: Start difference. First operand 8596 states and 12644 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:32,947 INFO L93 Difference]: Finished difference Result 26328 states and 40522 transitions. [2021-12-28 02:34:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:34:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:32,997 INFO L225 Difference]: With dead ends: 26328 [2021-12-28 02:34:32,997 INFO L226 Difference]: Without dead ends: 20082 [2021-12-28 02:34:33,017 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 [2021-12-28 02:34:33,018 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 1214 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:33,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 1445 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:34:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20082 states. [2021-12-28 02:34:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20082 to 14277. [2021-12-28 02:34:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14277 states, 12445 states have (on average 1.4894335074327039) internal successors, (18536), 12544 states have internal predecessors, (18536), 1124 states have call successors, (1124), 573 states have call predecessors, (1124), 706 states have return successors, (2032), 1225 states have call predecessors, (2032), 1120 states have call successors, (2032) [2021-12-28 02:34:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14277 states to 14277 states and 21692 transitions. [2021-12-28 02:34:33,731 INFO L78 Accepts]: Start accepts. Automaton has 14277 states and 21692 transitions. Word has length 102 [2021-12-28 02:34:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:33,731 INFO L470 AbstractCegarLoop]: Abstraction has 14277 states and 21692 transitions. [2021-12-28 02:34:33,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 14277 states and 21692 transitions. [2021-12-28 02:34:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:33,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:33,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:33,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:34:33,742 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1887996387, now seen corresponding path program 1 times [2021-12-28 02:34:33,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:33,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862343172] [2021-12-28 02:34:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:33,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:33,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:33,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:33,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:33,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:33,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862343172] [2021-12-28 02:34:33,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862343172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:33,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:33,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:33,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710447490] [2021-12-28 02:34:33,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:33,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:33,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:33,814 INFO L87 Difference]: Start difference. First operand 14277 states and 21692 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:36,911 INFO L93 Difference]: Finished difference Result 47687 states and 74704 transitions. [2021-12-28 02:34:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:34:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:37,015 INFO L225 Difference]: With dead ends: 47687 [2021-12-28 02:34:37,015 INFO L226 Difference]: Without dead ends: 35760 [2021-12-28 02:34:37,053 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 [2021-12-28 02:34:37,054 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1035 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:37,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 1969 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:34:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35760 states. [2021-12-28 02:34:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35760 to 25926. [2021-12-28 02:34:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25926 states, 22878 states have (on average 1.5124573826383425) internal successors, (34602), 23041 states have internal predecessors, (34602), 1892 states have call successors, (1892), 957 states have call predecessors, (1892), 1154 states have return successors, (4322), 2057 states have call predecessors, (4322), 1888 states have call successors, (4322) [2021-12-28 02:34:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25926 states to 25926 states and 40816 transitions. [2021-12-28 02:34:38,456 INFO L78 Accepts]: Start accepts. Automaton has 25926 states and 40816 transitions. Word has length 102 [2021-12-28 02:34:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:38,456 INFO L470 AbstractCegarLoop]: Abstraction has 25926 states and 40816 transitions. [2021-12-28 02:34:38,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 25926 states and 40816 transitions. [2021-12-28 02:34:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:38,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:38,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:38,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:34:38,473 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1048962725, now seen corresponding path program 1 times [2021-12-28 02:34:38,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:38,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923258883] [2021-12-28 02:34:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:38,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:38,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:38,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:38,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:38,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:38,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923258883] [2021-12-28 02:34:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923258883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:38,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:38,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636681965] [2021-12-28 02:34:38,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:38,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:38,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:38,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:38,561 INFO L87 Difference]: Start difference. First operand 25926 states and 40816 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:43,146 INFO L93 Difference]: Finished difference Result 88196 states and 141970 transitions. [2021-12-28 02:34:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:34:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:43,378 INFO L225 Difference]: With dead ends: 88196 [2021-12-28 02:34:43,378 INFO L226 Difference]: Without dead ends: 64620 [2021-12-28 02:34:43,441 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 [2021-12-28 02:34:43,442 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1054 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:43,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 1900 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:34:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64620 states. [2021-12-28 02:34:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64620 to 49288. [2021-12-28 02:34:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49288 states, 43872 states have (on average 1.5284008023340627) internal successors, (67054), 44163 states have internal predecessors, (67054), 3364 states have call successors, (3364), 1725 states have call predecessors, (3364), 2050 states have return successors, (10296), 3657 states have call predecessors, (10296), 3360 states have call successors, (10296) [2021-12-28 02:34:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49288 states to 49288 states and 80714 transitions. [2021-12-28 02:34:46,313 INFO L78 Accepts]: Start accepts. Automaton has 49288 states and 80714 transitions. Word has length 102 [2021-12-28 02:34:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:46,313 INFO L470 AbstractCegarLoop]: Abstraction has 49288 states and 80714 transitions. [2021-12-28 02:34:46,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 49288 states and 80714 transitions. [2021-12-28 02:34:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:34:46,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:46,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:46,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:34:46,349 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:46,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1168667673, now seen corresponding path program 1 times [2021-12-28 02:34:46,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:46,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079930473] [2021-12-28 02:34:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:46,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:46,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:34:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:46,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:34:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:46,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:34:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:34:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:46,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079930473] [2021-12-28 02:34:46,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079930473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:46,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:46,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:46,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792898684] [2021-12-28 02:34:46,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:46,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:46,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:46,433 INFO L87 Difference]: Start difference. First operand 49288 states and 80714 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:34:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:54,691 INFO L93 Difference]: Finished difference Result 168900 states and 281642 transitions. [2021-12-28 02:34:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:34:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-28 02:34:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:55,136 INFO L225 Difference]: With dead ends: 168900 [2021-12-28 02:34:55,136 INFO L226 Difference]: Without dead ends: 121962 [2021-12-28 02:34:55,246 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 [2021-12-28 02:34:55,246 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 999 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:55,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1908 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:34:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121962 states. [2021-12-28 02:35:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121962 to 95881. [2021-12-28 02:35:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95881 states, 85857 states have (on average 1.538371944046496) internal successors, (132080), 86404 states have internal predecessors, (132080), 6180 states have call successors, (6180), 3261 states have call predecessors, (6180), 3842 states have return successors, (26490), 6729 states have call predecessors, (26490), 6176 states have call successors, (26490) [2021-12-28 02:35:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95881 states to 95881 states and 164750 transitions. [2021-12-28 02:35:01,016 INFO L78 Accepts]: Start accepts. Automaton has 95881 states and 164750 transitions. Word has length 102 [2021-12-28 02:35:01,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:01,017 INFO L470 AbstractCegarLoop]: Abstraction has 95881 states and 164750 transitions. [2021-12-28 02:35:01,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-28 02:35:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 95881 states and 164750 transitions. [2021-12-28 02:35:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 02:35:01,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:01,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:01,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:35:01,088 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1392195173, now seen corresponding path program 1 times [2021-12-28 02:35:01,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:01,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112749724] [2021-12-28 02:35:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:01,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:01,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:01,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 02:35:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:01,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 02:35:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:01,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 02:35:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:01,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:35:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:01,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:01,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112749724] [2021-12-28 02:35:01,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112749724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:01,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:01,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:01,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515759624] [2021-12-28 02:35:01,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:01,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:01,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:01,164 INFO L87 Difference]: Start difference. First operand 95881 states and 164750 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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)